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1,975 NASA JPL Goldstone Demo of Wireless Power Transmission
The June 5, 1,975 NASA JPL Goldstone Demonstration of high power long distance wireless power transmission successfully transmitted 34kw of electrical power a distance of 1.5km at an efficiency of greater than 82%. At the time, it was the world record for high power long distance wireless power transmission, and it may remain the world record yet today.