Nikola Tesla designed a device for picking up energy from air. He never patented the device because of his fear of JP Morgan and his associates. Anyway, there are several books out that talk about this Tesla invention. You can find information about it at the link below and also in the books, Pentagon Aliens, and Occult Ether Physics by William Lyne. According to an excerpt in Pentagon Aliens, William Lyne learned from a rogue FBI agent that this device was used in their flying saucers as a free energy generation device. Also, William Lyne has his own drawings and information about the device also in his book Pentagon Aliens.
Practical Guide to Free-Energy Devices - Chapter 11
Practical Guide to Free-Energy Devices - Chapter 11
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