Did You Know...
...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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| Application No. | Application Title | Issue Date |
| 20110104967 | Flotation Device A device which will act efficiently as a float for any article (e.g. keys, mobile telephone, wallet) attached thereto when dropped into water comprises an inflatable bag (14) of substantially waterproof and air impervious material, a container (12) of comp... | 05/05/2011 |
| 20090318040 | BUOYAGE AND ENVIRONMENTAL MONITORING INSTRUMENT FOR USE ON REGATTA COURSES, COMPRISING AN INFLATABLE PNEUMATIC PLATFORM AND A MODULAR MAST WHICH CAN BE FOLDED AND TRANSPORTED IN A REDUCED-SIZE COMPACT PACKING CONTAINER The present invention relates to an instrument for marking and environmental monitoring in regatta courses. Incorporated by inflatable pneumatic platform and modular mast, foldable and transportable in compact packing of reduced size. It is intended to simultaneously de... | 12/24/2009 |
| 20090286432 | Apparatus Having A Buoyant Structure That Resists Rotation Apparatus includes a buoyant structure having a central vertical axis when floating in water and having at least one feature to reduce a rotation of the buoyant structure about the central vertical axis when floating in the water. The apparatus further includes an elect... | 11/19/2009 |
| 20080311805 | Inflatable buoyancy device with water-dependant triggering mechanism. This invention is directed toward a device which provides buoyancy to objects with negative buoyancy in water. The invention comprises a water-sensitive trigger which, when activated, causes a balloon to inflate, causing the object to float upon the surface where the us... | 12/18/2008 |
| 20070264890 | Underwater lifting device A lift device may comprise a housing containing a lift bag and a tank containing a working gas. The lifting device may be attached between a lift line descending from the surface of a body of water and a submerged object to be raised. A gas release mechanism that forms ... | 11/15/2007 |
| 20070135001 | FLOTATION APPARATUS A method and apparatus is provided to support a plurality of objects such as keys with an inflatable apparatus when the inflatable apparatus is exposed to a body of water. In one embodiment, an inflatable apparatus provides an attachment member such as a key ring to att... | 06/14/2007 |
