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.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7347462 | Door handle assembly including auxiliary bearing and auxiliary bearing support for a door handle A door handle assembly includes a door handle having an operator portion, and a shank extending from the operator portion. A mounting plate has a first bearing, the first bearing being sized to receive the shank of the door handle. An auxiliary bearing assembly incl... | 03/25/2008 |
| 6921116 | Door handle assembly A door handle assembly includes a bias mechanism that maintains inside and outer handles in a generally horizontal position in which a latching bolt of a latching bolt mechanism is fully extended, the latching bolt being retracted upon rotating either handle only ab... | 07/26/2005 |
| 6540274 | Slide A slide compartment for a hybrid lock architecture. The slide component comprises a U-shaped body portion and a plurality of independent retractors. At least one pair of slots are positioned near an open end of said U-shaped body for attachment of a drawb... | 04/01/2003 |
| 5735556 | Cylindrical lockset with reinforced chassis assembly A cylindrical lockset includes a latchbolt unit, a chassis assembly, a pair of spring cassettes and a pair of levers. The chassis assembly has a housing, a retractor disposed in the housing and connected operably to the latchbolt unit, and a pair of rollb... | 04/07/1998 |
| 5335948 | Cylindrical lockset A cylindrical lockset (20) includes an inside subassembly (22) and an outside subassembly (24) which are assembled with a door (208). Each subassembly (22, 24) includes a liner (26, 36), a rose (28, 38) and a lever (30, 40). A chassis assembly (58) includ... | 08/09/1994 |
| 5335950 | Door lockset with spindle bearing A lockset 20 includes an interior knob 24 mounted on an insert 26 and an exterior knob 62 mounted on an insert 64. A rose liner 30 and a cover 58 are mounted on the insert and provide a spaced bearing support for an interior assembly including knob 24. A ... | 08/09/1994 |
| 5165739 | Door latch A door latch including a spindle engaged between two knobs and rotated with the knobs, a housing formed in the knobs, a case having one end engaged in the housing, a stop engaged in the case, a latch bolt engaged in the case and including a head movable o... | 11/24/1992 |
| 4756178 | Low friction super heavy-duty lever handle lockset A lever type lockset with a rolling housing within a main housing. The roller housing normally only touches the main housing at the rollers and also connects to the latch portion of a lockset. The side plates of the roller are constructed separately from ... | 07/12/1988 |
| 4639026 | Door knob and door knob catch arrangement The arrangement comprises a standard, door knob-operated, latch mechanism in which the cylindrical shank of the door knob is slidably engaged with the rotatable spindle of the mechanism, and the spindle has a spring-biased catch projecting therethrough wh... | 01/27/1987 |
| 4422386 | Safe and method of making the same A safe having an outer shell mainly of plastic material, an inner liner of metal, and a filling of heat-resistive material between the shell and the liner. The safe body has a separate cover or door across the top of the body, and when the door is removed... | 12/27/1983 |
