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An aircraft having vertical takeoff and landing capability provided with at least first and second laterally extending paddle wheels rotatable on a central axis perpendicular to the longitudinal axis of the aircraft fuselage and between its nose and tail.
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| Number | Title | Issue Date |
| 4354189 | Switch and lock activating system and method A system and method are provided for opening a lock or activating a switch by electronically controlled means. In one form, a finger ring is provided which contains a code recording supported within or adjacent the crown thereof. When the hand of the pers... | 10/12/1982 |
| 4325146 | Non-synchronous object identification system A transponder/interrogator system for remotely identifying objects. The interrogator emits optical pulses to activate the transponder. Upon such activation, the transponder emits a unique code in the form of optical pulses in accordance with a program sto... | 04/13/1982 |
| 4288783 | Device for selectively authorizing passage through a door The invention comprises an improved device for selectively authorizing passage through a door. A card reader accessible from each side of the door comprises a path along which the card is moved, terminating at its opposite ends in respective slots with re... | 09/08/1981 |
| 4232354 | Electrically actuated lock for a door or similar access means An electrically actuated lock for a door or similar access means in which a multiple number of data bits are introduced in a given sequential manner into a plurality of series-connected data transfer parts each operable one at a time and in a selected seq... | 11/04/1980 |
| 4189712 | Switch and lock activating system and method A system and method are provided for opening a lock or activating a switch by electronically controlled means. In one form, a finger ring is provided which contains a code recording supported within or adjacent the crown thereof. When the hand of the pers... | 02/19/1980 |
| 4157534 | Locking system for hotels The disclosure relates to a locking mechanism and a related control system. It is intended for use in hotels and other private and public buildings which require a high degree of security, and which also make keys available to the general public, or to pe... | 06/05/1979 |
