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 |
| 7163221 | Retractable vehicle step with anti-strike/anti-pinch sensor system A retractable step assist for a vehicle comprises a step, an actuator, an optical fiber sensor, and a safety. The step is movable between a retracted position and a deployed position that is downward and outboard from the retracted position. The actuator is mechanic... | 01/16/2007 |
| 6341563 | Door opening control apparatus A platform sensing and control system including a wireless sensor (10, 12) for sensing at least the presence of a platform (26) opposite a door (32) of a railcar and providing an output indication of at least a platform presence in response thereto, and a... | 01/29/2002 |
| 6264222 | Retractable stairway assembly for a vehicle A stairway assembly is pivoted between deployed and stowed positions. The stairway in one form includes a sliding support from which the stairway is suspended at a location spaced from a stairway pivot. A link, which may be adjustable in length, couples t... | 07/24/2001 |
| 6179312 | Retractable stairway for entering and exiting a vehicle A retractable stairway assembly for entering and exiting a vehicle with a cab has a stairway with steps. The stairway assembly is movable between a retracted position, in which the stairway is beneath the cab, and an extended position, in which the stairw... | 01/30/2001 |
| 4110673 | Extendable vehicle step and step motor control system A step structure for mobile homes and the like. A base is secured to an underside of the vehicle and serves to pivotally mount a linkage which in turn carries a pair of step rails on which a step is slidably mounted. Extension and retraction of the step i... | 08/29/1978 |
| 3997183 | Step-grab element system for a vehicle A step-grab element system is provided for ascending to or descending from an elevated position on a vehicle. A step and a grab element are each pivotally connected to the vehicle and are connected to one another for moving the step between an operable po... | 12/14/1976 |
