Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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US Patent 5503350 - Microwave-powered aircraft
US Patent Issued on April 2, 1996
Estimated Patent Expiration Date:
October 28, 2013Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
Estimated Patent Expiration Date:
October 28, 2013Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.AbstractAn unmanned, remotely controlled microwave-powered aircraft for use as a stationary communications platform. The aircraft is generally a flying wing with a large, flat inner wing having a rectenna on the underside. Rectennas may also be provided on the underside of the wings, the combined output from the rectenna being used to provide power to two electric motors housed within torpedo-shaped nacelles which drive two rear propellers. The rectenna converts a microwave signal at 35 GHz generated by a ground power station utilizing dual gyrotrons and a 34-meter diameter antenna dish. The aircraft has a preferred airfoil cross section throughout and is constructed of lightweight but strong materials in order to provide an enhanced flying time of several months. A power management and distribution system manages the DC power produced by the rectenna to supply power to the flight controls, propulsion system and payload. | InventorAssigneeApplicationNo. 145204 filed on 10/28/1993US Classes:244/1R, MISCELLANEOUS244/13, Airplane sustained244/62, AIRCRAFT PROPULSION244/190, Of pilotless aircraft244/194Monitoring circuit or responseField of Search244/1R, MISCELLANEOUS244/13, Airplane sustained244/36, Lifting fuselages244/62, AIRCRAFT PROPULSION244/189, By remote radio signal244/190, Of pilotless aircraft244/194Monitoring circuit or responseExaminersPrimary: Grant, WilliamAttorney, Agent or FirmUS Patent ReferencesD139634, D145145, 1893129, 2604276, 4662588, Airplane configured with a moveable disk structureIssued on: 05/05/1987 Inventor: Henderson4943811, Dual polarization electromagnetic power reception and conversion system Issued on: 07/24/1990 Inventor: Alden, et al.4955562, Microwave powered aircraft Issued on: 09/11/1990 Inventor: Martin, et al.5068669, Power beaming system Issued on: 11/26/1991 Inventor: Koert, et al.5082204, All wing aircraft Issued on: 01/21/1992 Inventor: Croston5218374Power beaming system with printer circuit radiating elements having resonating cavities Issued on: 06/08/1993 Inventor: Koert, et al. Foreign Patent References
International ClassB64C 039/02 |
