Famous Patents
Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 7347763 | Toy vehicle for children The toy vehicle is characterized in that a rear excavator is fastened to the toy vehicle, that a seat boom is rotatably arranged on a receiving block which is fastened to the toy vehicle, that a support leg is mounted on the receiving block and is pivotable between ... | 03/25/2008 |
| 7175162 | Screw driven hoist A hoist provides high mechanical advantage and accurate positioning, driven by hand or with a powered rotary implement such as a drill. The hoist includes flexible tension members, such as chains, cables or straps, for applying force and tension to a load. A load nu... | 02/13/2007 |
| 4653653 | Hoisting systems A safety system for overhead hoisting cranes is provided which incorporates a overload release coupling in the high speed drive shaft between the prime mover and the gear reducers driving one or more hoist drums with a dual reeving and a safety brake acti... | 03/31/1987 |
| 3997061 | Toy crane A toy crane provided with a base, a tower extending upwardly therefrom, a boom mounted to rotate about the tower, a carriage mounted to travel along the boom, an implement that may be raised and lowered from the carriage, and a control station permitting ... | 12/14/1976 |
