...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 7967246 | Flying wing boat A flying wing boat is provided, which comprising a fuselage provided with a cockpit at a bow thereof; a pair of main wings, each of which being pivotably connected to one side of the fuselage respectively and being provided with a flap; a pair of pontoons, each of w... | 06/28/2011 |
| 7338336 | Watercraft hull with adjustable keel A watercraft hull having a pair of laterally spaced propulsion tunnels located on opposite sides of its keel, with said tunnels being open downwardly towards the water, includes a movably mounted keel section located between said propulsion tunnels to prevent water ... | 03/04/2008 |
| 7334756 | Ground-effect craft and method for the cruising flight thereof The invention relates to flying vehicles. A centre wing is provided with aerodynamic profiles on the longitudinal sections thereof. A cigar-shaped fuselage is arranged on the central wing. A crew cabin and a cargo-passenger cabin are arranged inside the fuselage. Ho... | 02/26/2008 |
| 7322872 | Model toy aircraft A model toy aircraft is adapted for remote control operation on land, on the water and in the air. The toy aircraft includes a pair of pontoons spaced apart by a horizontal wing forming a tunnel hull. A tail section is provided including one or more moveable directi... | 01/29/2008 |
| 7311059 | Watercraft hull with entrapment tunnel A watercraft hull has at least one bent entrapment tunnel with an aft portion whose tunnel ceiling is at a higher elevation than portions of the tunnel ceiling immediately in front of it to provide a negative angle of attack with the free surface at design planing s... | 12/25/2007 |
| 7252264 | Flying sailboat A vehicle adapted for airborne flight and waterborne sailing has a fuselage (20) with left and right wings (52, 54) that pivot independently about a respective longitudinal axis from a generally horizontal orientation for flight to a generally vertical... | 08/07/2007 |
| 7207522 | Safety device trigger for activating a safety device An emergency floatation system for a helicopter includes a safety trigger device for inflating at least one raft during the course of an emergency. The safety trigger device includes a plurality of handles such that pulling any one of the plurality of handles trigge... | 04/24/2007 |
| 7188804 | Float retractable landing gear A float retractable landing gear. The float retractable landing gear incorporates a wheel support, a side gear door, a bottom gear door, and one or more hinges and strut ears attached to a spine. At least one hinge is rotatably attached to a float. The float incorpo... | 03/13/2007 |
| 7150435 | Type aircraft The present invention relates to a new type aircraft. The aircraft includes the airframe and wing, characterized in that the transverse section of airframe has an oblate (oval) profile with corrugated area on the ventral of airframe; the aircraft has uneven friction... | 12/19/2006 |
| 7131561 | Conformable boat rack A boat rack apparatus for carrying a boat on a vehicle roof rack includes a plurality of conformable support members. Each support member has an expanse that contacts a boat hull. The expanse is supported by a rib arrangement, including a spring rib and a load rib. ... | 11/07/2006 |
| 7090549 | System to propel an air powered boat Air propulsion system for a boat comprises an internal combustion engine for powering a propeller in a single rotational direction. A pivoting mechanism pivots the propulsion system through a 360 degree arc about a transverse horizontal axis from a first position in... | 08/15/2006 |
| 7063291 | Amphibian delta wing jet aircraft An amphibian delta wing jet aircraft, which has a plurality of triangular folding wing panels, two of which are hingedly attached to a lifting shape body, which incorporates a W-shaped hull in it's cross section of a fuselage so that the craft operates efficiently a... | 06/20/2006 |
| 7040573 | Landplane to flying boat conversion An aerodynamically efficient fiberglass hull consisting of a pointed bow, a step amidships, and aft section coming to a point which will be attached to the hull of land aircraft and convert them to water operations. In addition, one wing float will be securely attac... | 05/09/2006 |
| 7040572 | Lighter-than-air aircraft with air cushion landing gear means A lighter-than-air aircraft (1) having a gas-filled hull (2) and a pair of spaced apart landing gear units (11, 12) on the underside of the hull arranged on opposite sides of a longitudinally extending central vertical plane of the hull. Each la... | 05/09/2006 |
| 6997413 | Flying amphibious SUV The amphibious aircraft has two top mounted wings and an engine having a rear mounted propeller. The aircraft also has a tail having two wings mounted in a V-shaped fashion. Each of the wings has a pivotal tip mounted thereon. The aircraft also has a sponson on each... | 02/14/2006 |
| 6957792 | Lifting arrangement for aircraft fuselages A lifting arrangement for aircraft fuselages that consists of placing longitudinal vertical or slanted fins or plates on the lower and lateral lower part of the whole fuselage, said fins forming a channel with the underside of the fuselage, including nose, fuselage ... | 10/25/2005 |
| 6592073 | Amphibious aircraft General aviation class amphibious aircraft which include two fuselages, each having a hydrodynamic surface, the fuselages connected via a primary flight surface and a ducted power plant located aft and above the fuselages. The power plant location removes... | 07/15/2003 |
| 6409122 | Anti-submarine warfare UAV and method of use thereof An anti-submarine warfare system includes an unmanned "sea-sitting" aircraft housing submarine detecting equipment, the aircraft including a body portion having a catamaran configuration adapted for stably supporting the body portion when sitting in water... | 06/25/2002 |
| 6367737 | Amphibious aircraft An amphibious airplane having an engine assembly mounted at a top center location in the fuselage, and a tail assembly having a horizontal fin in an elevated position so as to be in the propeller air stream. A lift augmenting aerodynamic surface is positi... | 04/09/2002 |
| 6113028 | Amphibious aircraft An amphibious airplane having an engine assembly mounted at a top center location in the fuselage, and a tail assembly having a horizontal fin in an elevated position so as to be in the propeller air stream. A lift augmenting aerodynamic surface is positi... | 09/05/2000 |
| 6042052 | Retractable step fairing for amphibian airplane The invention comprises an improved seaplane having a retractable step. The term retractable step, however, is a misnomer. The step portion of the seaplane float includes a panel which may be extended once the plane is airborne to reduce aerodynamic drag ... | 03/28/2000 |
| 5913493 | Seaplane hull A seaplane hull which in one embodiment has a high length to beam ration, substantially fair topside waterlines from bow to stern and a fine bow entry angle is disclosed. These characteristics minimize dispersement of the water, offering the low wave-maki... | 06/22/1999 |
| 5850990 | Multi-purpose aircraft Several innovative systems for an aircraft, and aircraft incorporating them, are disclosed. Features include inboard-mounted engine(s) with a belt drive system for turning wing-situated propellers; compound landing gear integrating ski, pontoon and wheel ... | 12/22/1998 |
| 5692706 | Inflatable float step-reinforcement system An improved step reinforcement system is disclosed for use in inflatable or pneumatic aircraft floats such as are employed in waterborne and amphibious aircraft. The float itself comprises a continuous tubular shell having spaced apart upper and lower wal... | 12/02/1997 |
| 5645250 | Multi-purpose aircraft Several innovative systems for an aircraft, and aircraft incorporating them, are disclosed. Features include inboard-mounted engine(s) with a belt drive system for turning wing-situated propellers; compound landing gear integrating ski, pontoon and wheel ... | 07/08/1997 |
| 5415365 | High performance amphibious aircraft An amphibious aircraft, capable of high speed maneuverability on the surface of the water, utilizes a aerodynamic platform to generate lift and to define a tunnel with a pair of central sponsons extending inwardly of the wings of the aircraft longitudinal... | 05/16/1995 |
| 5277383 | Amphibian aircraft The invention relates to an amphibian aircraft incorporating a hydrodynamic system formed by three floats wherein the first two floats are attached to a fuselage leading portion symmetrically to the aircraft axis and the third float is attached to a fusel... | 01/11/1994 |
| 5242132 | Multi-hulled aircraft/boat An amphibious aircraft capable of V-STOL operations, the aircraft comprised of a pair of buoyant, coterminus, and elongated body members having an axially converging and diverging profile, joined together at the forward end thereof by a forward fuselage h... | 09/07/1993 |
| 5136961 | Hydroplaning hydrofoil/airfoil structures and amphibious and aquatic craft A hydroplaning hydrofoil and airfoil planing or flying wing structure is disclosed based on the concept of forward-swept planes or planar surfaces having swept-back fore foil sections and forward-swept aft foil sections upon which the hydrofoil/airfoil st... | 08/11/1992 |
| 5018686 | Hydrodynamic lift for flying boats or sea planes A flying boat or sea plane has a wing system in order to obtain hydrodynamic lift when protracted and including two wings arranged one above the other but establishing, in front view, a closed frame; the wing system can be retracted into the fuselage of t... | 05/28/1991 |
| 4962978 | High efficiency seaplane A seaplane having a low wing, a cabin over the wing, a pusher propeller located at the aft end of the cabin and just forward of the trailing edge of the wing and an empennage supported on a tail boom. The central portion of the leading edge of the wing ex... | 10/16/1990 |
| 4691881 | High performance amphibious airplane An amphibious executive or business airplane, also having military application, possesses sponsons integrated with the airplane fuselage. The trailing end of the sponsons end in a sharp edge, thus eliminating the need for a hull or float step or venting. ... | 09/08/1987 |
| 4579297 | Air, land and sea vehicle Air, Land and Sea vehicle is convertible between aircraft form, road vehicle form and boat form. The conversion between aircraft form and road vehicle forms having (4) four tires as an automobile as well as a roadable vehicle structure that are movable ou... | 04/01/1986 |
| 4270713 | Airplane with a boat-shaped fuselage A flying boat having a boat-like fuselage with a substantially horizontal separation thereof extending in the longitudinal direction into two structural parts which may be separately manufactured, the two parts being a complete lower boat body part and an... | 06/02/1981 |
| 3965836 | High speed water vessel A high speed water vessel includes a body having a waterborne hull which is lifted upwardly as the vessel moves through the water to reduce drag forces on the hull. Lift forces are imparted to the hull under the combined influence of rotors and airfoils o... | 06/29/1976 |
| 3966143 | Self-launching glider An aircraft of variable geometry and certain unique features which allow its operation along the surface of water, ice or the ground under sail power provided by tilting the wings up into a cross-wind to attain sufficient speed to be self launched into gl... | 06/29/1976 |