Technology and Engineering Atlas

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Technology and Engineering Atlas

Open Questions

Things this atlas does not know. Each entry is a question that specialists have posed and not settled, recorded with what would actually resolve it and which expertise the answer needs.

These are kept deliberately, rather than quietly omitted. An atlas that shows only what it is sure of implies a confidence it has not earned, and the gaps are often where the interesting work is. Several sit exactly where two fields fail to meet: identifying the hyssop of the Hebrew Bible needs a botanist and a philologist of Biblical Hebrew, and neither one settles it alone.

Grouped by the shape of the gap rather than its subject: what sort of thing is unresolved.

Showing 1 to 20 of 38 open questions, page 1 of 2.

attribution 27

Who said or wrote or made something, where the record is incomplete.

The Wheel Who Invented the Wheel

Open The Wheel

Why It Is Open The wheel's earliest archaeological evidence is a potter's wheel and shortly after a wheeled cart from Mesopotamia, roughly 3500 BCE, but similar wheeled vehicles appear in the archaeological record across Central Europe and the Caucasus within a few centuries of each other, and no single inventor or point of origin can be credited from the evidence that survives.

What Would Settle It Additional securely dated archaeological finds that establish a clear chronological and geographic priority among the early Mesopotamian, Central European and Caucasus wheeled-vehicle finds; none exists today.

Expertise Needed Archaeology

Radio Did Guglielmo Marconi know of Alexander Popov's 7 May 1895 coherer receiver demonstration before filing his own 1896 patent application, or did the two men arrive at similar designs independently from the same published coherer research?

Open Radio

Why It Is Open Popov demonstrated a coherer based receiver to the Russian Physical and Chemical Society on 7 May 1895 but did not patent it or publish it outside Russia in a form clearly available to Marconi at the time. Both men were building on the same coherer research already published by Oliver Lodge and others, so the resemblance between their early receivers does not by itself prove either man copied the other.

What Would Settle It A primary correspondence, laboratory notebook or contemporary press account placing Marconi in direct contact with Popov's published results before Marconi's own 1896 patent filing; none has surfaced in the sources consulted for this entry.

Expertise Needed History of technology

Question posed in Invention of Radio (Wikipedia), Wikipedia contributors.

The Mechanical Clock Does Su Song's 1092 water-driven astronomical clock tower count as the first mechanical clock, or does that title belong to the weight-driven verge-escapement clocks first attested in Europe in the 1280s?

Open The Mechanical Clock

Why It Is Open The two traditions used different power sources, a water clock feeding an escapement-like linkwork versus a purely weight-and-spring drive train, so the answer turns on which feature defines "mechanical clock," not on a missing fact.

What Would Settle It A settled scholarly definition of "mechanical clock" that either includes or excludes an escapement-regulated but water-powered drive train would resolve which tradition holds priority.

Expertise Needed History of technology

Question posed in History of Timekeeping Devices (Wikipedia), Wikipedia contributors, Lead section.

Radar Who should be credited as radar's inventor: Christian Hulsmeyer's 1904 patent, Robert Watson-Watt's 1935 Daventry Experiment, or one of the other near-simultaneous 1930s national radar programs in Germany, France, the United States or the Soviet Union?

Open Radar

Why It Is Open At least five countries reached a working radio-echo detection system independently within a few decades of each other, so the question is which milestone, a working principle, a working military system, or an operational network, defines "invention."

What Would Settle It A settled convention for what counts as the invention of a multi-national simultaneous-discovery technology, comparable to how the field already treats the telegraph and telephone priority disputes, would resolve this the same way.

Expertise Needed History of technology

Question posed in Radar (Wikipedia), Wikipedia contributors, Lead section.

The Microprocessor Was Garrett AiResearch's classified Central Air Data Computer chip set (1968-1970), Texas Instruments' 1971 single-chip CPU patent, or Intel's commercially released 4004 (1971) the first true microprocessor?

Open The Microprocessor

Why It Is Open The three claims answer different questions, first working design, first patent, first commercial product, and the classified CADC design was not publicly documented until years after it was built, so the historical record itself was incomplete for years, not merely uncollected.

What Would Settle It A settled convention for whether "first microprocessor" means first working design, first patent or first commercial release would resolve which claim wins under that definition; no new archival evidence is expected to change the underlying facts.

Expertise Needed History of technology

Question posed in Microprocessor (Wikipedia), Wikipedia contributors, Lead section.

Vulcanization Does priority for vulcanization belong to Charles Goodyear, who discovered the sulfur-and-heat process in 1839, or Thomas Hancock, who filed the first patent on it, in Britain, in 1843?

Open Vulcanization

Why It Is Open Goodyear discovered the process first but did not patent it until 1844; Hancock examined a Goodyear sample, independently worked out the same process, and patented it in Britain weeks before Goodyear's own British filing. Neither side has ever produced evidence settling whether Hancock copied or independently rediscovered the process.

What Would Settle It Documentary evidence of exactly what Hancock learned from the Goodyear sample he examined, if any, versus what he derived independently, would settle whether his 1843 patent was an independent rediscovery or a derivative of Goodyear's work.

Expertise Needed History of technology

Question posed in Vulcanization (Wikipedia), Wikipedia contributors, Lead section.

Sintering Should sintering's origin be dated to its ancient craft use in fired ceramics and early sintered-metal artifacts, or to William Coolidge's 1909 patented process, the point it became a deliberately engineered industrial technique?

Open Sintering

Why It Is Open Ancient artisans achieved sintering empirically without understanding or naming the underlying process, so the entity's single origin-year property cannot represent both an ancient craft practice and a specific engineering milestone at once.

What Would Settle It A convention for whether this atlas's "origin-year" property means first craft use or first deliberate engineering formalization would settle which date belongs on this fact, consistent with how the atlas already treats other ancient-craft-to-modern-engineering methods.

Expertise Needed History of technology

Question posed in Sintering (Wikipedia), Wikipedia contributors, Lead section.

Aluminum Does priority for isolating metallic aluminum belong to Hans Christian Orsted, whose 1825 sample was first but impure and never fully confirmed, or to Friedrich Wohler, whose 1827 sample was purer and better documented?

Open Aluminum

Why It Is Open Orsted's 1825 method was not fully published or independently repeated at the time, while Wohler's 1827 work is the first isolation historians can verify in detail; whether "first isolation" should credit priority in time or the first confirmable result is a genuine, unresolved editorial question, not a missing fact.

What Would Settle It A surviving, dated laboratory record of Orsted's exact 1825 method and result, sufficient for modern chemists to confirm what he actually produced, would settle whether his claim meets the same evidentiary bar Wohler's does.

Expertise Needed History of chemistry

Question posed in Aluminium (Wikipedia), Wikipedia contributors, Lead section.

Carbon Nanotube Who actually discovered carbon nanotubes: Radushkevich and Lukyanovich in 1952, or Sumio Iijima in 1991?

Open Carbon Nanotube

Why It Is Open The Wikipedia article on carbon nanotubes states plainly that their discoverers true identity is a subject of some controversy. L. V. Radushkevich and V. M. Lukyanovich published clear images of 50 nanometre diameter hollow carbon tubes in the Journal of Physical Chemistry of Russia in 1952, but the work went largely unnoticed in the West because it was published in Russian during the Cold War, when Soviet scientific journals were hard for Western researchers to access. Sumio Iijima of NEC reported similar tube structures in 1991 in a widely read Western journal, and most academic and popular literature since has credited him with the discovery, even though a later editorial by Monthioux and Kuznetsov argued Radushkevich and Lukyanovich should be credited instead for the earlier finding that carbon filaments could be hollow at nanometre scale.

What Would Settle It A settled history-of-science judgment, backed by a close reading of the 1952 Russian paper against the 1991 Iijima paper, on whether Radushkevich and Lukyanovich actually observed and reported the same structure now called a carbon nanotube, or a related but distinct filament; absent that, the field has settled on Iijima by convention rather than by a resolved priority claim.

Expertise Needed History of science and materials science historiography

Question posed in Carbon Nanotube (Wikipedia), History section, paragraphs on early observations 1950s-1991 and the Monthioux and Kuznetsov editorial on discovery credit.

Electrical Engineering Who should be credited as inventor of the integrated circuit: Jack Kilby (hybrid IC, Texas Instruments, 1958) or Robert Noyce (monolithic IC, Fairchild Semiconductor, 1959)?

Open Electrical Engineering

Why It Is Open Wikipedia's electrical engineering article states plainly that "the first integrated circuits were the hybrid integrated circuit invented by Jack Kilby...in 1958 and the monolithic integrated circuit chip invented by Robert Noyce...in 1959," naming two independent inventors and two designs rather than one. Kilby received the 2000 Nobel Prize in Physics partly for this work; Noyce, who died in 1990, could not share it. This is exactly the kind of priority dispute the technology atlas records as the field's character.

What Would Settle It Historians of technology generally treat this as a case of near-simultaneous independent invention rather than a resolvable priority question; what would resolve it is a family-wide decision on how to record dual/independent invention rather than forcing a single credited inventor.

Question posed in Electrical Engineering (Wikipedia), Wikipedia contributors, History section, integrated circuit paragraph.

Industrial Engineering Who deserves primary credit for founding industrial engineering as a discipline: Frederick Winslow Taylor, originator of time study, or Frank and Lillian Gilbreth, originators of motion study?

Open Industrial Engineering

Why It Is Open Time study and motion study were developed independently and stood in philosophical tension; the disagreement between Taylor and the Gilbreths became a personal rift that, after Taylor died, turned into an open feud between the Gilbreths and the Taylor camp, and the documented record states that friction over questions of history and intellectual property still remains even after Lillian Gilbreth attempted to heal the rift.

What Would Settle It A settled historical account, backed by primary correspondence or patent records, establishing whose methodological contribution founded industrial engineering as a discipline and how the intellectual property dispute between the two camps was actually resolved.

Expertise Needed History of Technology

Question posed in Frank Bunker Gilbreth (Wikipedia), Wikipedia contributors, Wikipedia, Frank Bunker Gilbreth, section Scientific management.

Nuclear Engineering Who deserves primary credit for founding nuclear engineering: Leo Szilard, who conceived and patented the chain reaction concept in 1933 and 1936, or Enrico Fermi, who led the team that achieved the first actual self sustaining chain reaction in 1942?

Open Nuclear Engineering

Why It Is Open Szilard originated and patented the theoretical concept of a nuclear chain reaction years before any working device existed, while Fermi led the team that turned the concept into the first working reactor at Chicago Pile One in 1942 and later jointly held a nuclear reactor patent together with Szilard; historical accounts differ on which contribution defines the founding of the discipline, and Fermi has separately been called the architect of the nuclear age.

What Would Settle It A settled historiographical consensus, or a definitive patent and priority record, on whether conceptual origination or first successful engineering achievement carries primary founding credit.

Expertise Needed History of Technology

Question posed in Leo Szilard (Wikipedia), Wikipedia contributors, Wikipedia, Leo Szilard, lead section.

Petroleum Engineering Does the 1859 well Edwin Drake drilled at Titusville, Pennsylvania mark the true first oil well, or do earlier wells in Poland, Germany and Canada hold genuine priority?

Open Petroleum Engineering

Why It Is Open Drake is credited as the first American to successfully drill for oil, and the well he drilled launched the modern petroleum industry, but documented claims of prior art for oil drilling exist from Bóbrka, Poland in 1854, Wietze, Germany in 1857, and Oil Springs, Ontario in 1858, each predating the Drake well.

What Would Settle It An agreed definition of what counts as a genuine oil well, mechanically drilled rather than dug, and commercially significant rather than experimental, against which the historical record could be measured.

Expertise Needed History of Technology

Question posed in Edwin Drake (Wikipedia), Wikipedia contributors, Wikipedia, Edwin Drake, Career section.

Metallurgical Engineering Should Henry Bessemer or William Kelly be credited with inventing the pneumatic steelmaking process that founded modern metallurgical engineering, given that Kelly began experimenting before Bessemer filed his patent, yet went largely unrecognized?

Open Metallurgical Engineering

Why It Is Open Kelly experimented with injecting air into molten iron in the early 1850s, before Bessemer patented a similar process in 1855; after a financial panic in 1857, a company that had already licensed the Bessemer process purchased the Kelly patents outright and licensed both under the Bessemer name, and the documented record states that the role Kelly played in the invention has remained far less known.

What Would Settle It A settled historical account weighing the timing of independent invention against the commercial and patent outcomes that decided which name attached to the process.

Expertise Needed History of Technology

Question posed in William Kelly (Wikipedia), Wikipedia contributors, Wikipedia, William Kelly (inventor), lead section.

Nanotechnology Who should be credited as the founder of nanotechnology: Richard Feynman for his 1959 talk on room at the bottom, Norio Taniguchi for coining the term nano technology in 1974, or K. Eric Drexler for independently reviving and popularizing the term from 1981 onward?

Open Nanotechnology

Why It Is Open The talk Feynman gave is widely cited as the conceptual origin of nanotechnology, but many early nanotechnology researchers say it did not influence their own work and had not read it until much later; Taniguchi was the first to actually use the term nano technology, in 1974; and Drexler used the term again in 1981 without knowing of the earlier Taniguchi use, then went on to popularize it. Historians describe the status given to Feynman in the field as retroactively attached, to give nanotechnology a packaged history.

What Would Settle It A settled disciplinary consensus on whether founding credit belongs to conceptual precedent, to terminological coinage, or to later independent popularization.

Expertise Needed History of Technology

Question posed in History of Nanotechnology (Wikipedia), Wikipedia contributors, Wikipedia, History of nanotechnology, Norio Taniguchi section.

Mechanical Engineering Who deserves credit for inventing the four-stroke internal combustion engine cycle: Alphonse Beau de Rochas, who patented the concept in 1862 without building an engine, or Nikolaus Otto, who built the first working four-stroke engine in 1876?

Open Mechanical Engineering

Why It Is Open Alphonse Beau de Rochas, a French engineer, patented the theoretical concept of the four-stroke engine cycle in 1862 but never built a working engine. Nikolaus Otto built and commercialized the first successful four-stroke engine in 1876, unaware of the Rochas patent, and only lost part of his own German patent years later when Gottlieb Daimler's lawyer discovered Rochas's earlier description while searching for a way around royalty payments.

What Would Settle It A settled historiographical consensus on whether conceiving and patenting an unbuilt idea, or independently engineering and commercializing the same idea, carries the primary credit for founding the discipline; historians of technology continue to credit both figures for different reasons.

Expertise Needed History of Technology

Question posed in Nikolaus Otto (Wikipedia), Wikipedia contributors, Earlier patents section.

Marine Engineering Who deserves priority for inventing the marine screw propeller: Francis Pettit Smith, who patented his design on 31 May 1835, or John Ericsson, who filed an independent patent six weeks later?

Open Marine Engineering

Why It Is Open Francis Pettit Smith and John Ericsson began working on the marine screw propeller separately in Britain in 1835. Smith filed the first patent, on 31 May, while Ericsson, working independently, filed his own patent about six weeks later; each went on to build and demonstrate a working screw-propelled boat within the following two years.

What Would Settle It The historical record itself credits both men as independent parallel inventors rather than settling one point of priority; a documented consensus on whose contribution founded the technology, first patent versus first proven working demonstration, does not exist.

Expertise Needed History of Technology

Question posed in Propeller (Wikipedia), Wikipedia contributors, Screw propellers section.

Biomedical Engineering Who deserves primary credit for the first implantable cardiac pacemaker: Rune Elmqvist and Åke Senning, whose device was implanted in Sweden in 1958, or Wilson Greatbatch, whose independently developed device entered use in the United States in 1960?

Open Biomedical Engineering

Why It Is Open The first clinical implantation of a fully implantable pacemaker took place in Sweden on 8 October 1958, using a device designed by Rune Elmqvist and surgeon Åke Senning, but it failed within three hours and needed rapid replacement. Wilson Greatbatch's independently engineered implantable pacemaker, using a mercury-battery design, entered use in the United States in April 1960 and proved durable enough for his patient to live a further eighteen months.

What Would Settle It Whether the first, short-lived implant or the first durable design founded modern implantable pacemaker engineering is treated differently by different national and disciplinary histories, and no single source resolves which contribution carries primary credit.

Expertise Needed History of Technology

Question posed in Artificial Cardiac Pacemaker (Wikipedia), Wikipedia contributors, Implantable section.

Energy Engineering Who deserves credit for the first wind turbine to generate electricity: James Blyth, who built one in Scotland in July 1887, or Charles F. Brush, who built the first automatically operated one in the United States months later?

Open Energy Engineering

Why It Is Open In July 1887, Scottish academic James Blyth built and installed a battery-charging wind machine to light his own holiday home in Marykirk, Scotland. Months later, American inventor Charles F. Brush built what sources describe as the first automatically operated wind turbine for electricity production in the United States, after peer review of his design with local university professors.

What Would Settle It Whether Blyth's earlier but non-automatic machine or Brush's later but automatically operating turbine deserves credit as the first true wind turbine depends on which criterion, chronological priority or technical completeness, is taken as decisive, and sources do not agree on which should govern.

Expertise Needed History of Technology

Question posed in Wind Turbine (Wikipedia), History section, early wind turbines paragraph.

Agricultural Engineering Who deserves primary credit for the mechanical reaper: Obed Hussey, who patented his design in 1833, or Cyrus McCormick, who patented a competing design in 1834 and claimed an even earlier 1831 invention?

Open Agricultural Engineering

Why It Is Open Obed Hussey patented a mechanical reaper in Ohio in 1833. Robert McCormick's son Cyrus McCormick patented a competing reaper design in 1834, and Cyrus McCormick himself later claimed the machine was actually invented in 1831, which would predate Hussey's patent. The two designs competed in the marketplace for decades and were the subject of several lawsuits.

What Would Settle It A verified, independently documented date for the McCormick reaper's true first working version would settle whether Hussey's filed 1833 patent or McCormick's disputed 1831 claim has real chronological priority; no such independent record has been produced.

Expertise Needed History of Technology

Question posed in Reaper (Wikipedia), Wikipedia contributors, Mechanical reapers in the U.S. section.