Radar

Although Tesla never filed related patents, he was the first to theorize the use of reflected radio waves for detection of objects as documented in his 1917 article, "Tesla's Views on Electricity and the War." Though not built, his ideas on pulsed waves and detection predated Robert Watson-Watt's 1935 system.

His visionary concept contributed to military and aviation technologies during World War II. Tesla's vision extended to aviation safety, foreshadowing modern radar in air traffic control and weather monitoring.

While Tesla's proposal was theoretical, it built on his high-frequency work, contributing to electromagnetic detection fields. Today, radar is essential in navigation, defense, and autonomous vehicles, reflecting his prescient insights.