Home›Open Questions›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 QuestionsWho 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?Citation FormatsGeneral ReferenceGeneral Reference Citation TextTechnology and Engineering Atlas. "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?." Accessed August 30, 2026. https://technology.interactiveatlas.org/open-questions-index/who-invented-radar.Copy General ReferenceAPA StyleAPA Style Citation TextTechnology and Engineering Atlas. (n.d.). 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?. Retrieved August 30, 2026, from https://technology.interactiveatlas.org/open-questions-index/who-invented-radarCopy APA StyleBibTeXBibTeX Citation Text@misc{technologyandengineeringatlas-who-should-be-credited-as-radar-s-invent, author = {Technology and Engineering Atlas}, title = {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?}, year = {2026}, url = {https://technology.interactiveatlas.org/open-questions-index/who-invented-radar}, note = {Accessed August 30, 2026} }Copy BibTeXOpen QuestionCross-Tradition ConnectionsSourcesComments (0)Reader Challenges (0 open reader challenges)Open QuestionAt 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 resolve this 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.OpenHistory of technologyWikipedia contributors, Radar (Wikipedia)Cross-Tradition ConnectionsQuestion OnRadar, Inventions Well-attested Source Radar (Wikipedia)Wikipedia contributorstier 2SourcesRadar (Wikipedia)tier 2Wikipedia contributors, Wikimedia FoundationView the SourceComments (0)No comments yet. Be the first to share a thought.Sign in to join the discussion.Reader Challenges (0 open reader challenges)No disputes yet. Spotted an error or a better source? Open the first one.Sign in to dispute this or suggest a correction.View At A Past YearThe atlas records no dated fact of its own for this entry, so there is no other year to choose.Show This Year