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 |
| 7248142 | Thin deflectable resistor A system and method for a deflectable resistor. The deflectable resistor has a first layer of conductive material and a second layer of conductive material on a top surface of a substrate, said first layer of conductive material having a resistance that changes pred... | 07/24/2007 |
| 7060923 | Key A key has a varying response depending on the manner of depression. The key comprises at least a base and a switching element arranged curved relative to one another. Between the switching element and the base is a contact area where the switching element touches th... | 06/13/2006 |
| 6069552 | Directionally sensitive switch An electrical switch has spaced, facing coupler and carrier layers with a set of electrodes formed on the facing surfaces thereof. There is an aperture in the coupler layer. A conductive armature is disposed in the space between the coupler and carrier, a... | 05/30/2000 |
| 5949325 | Joystick pointing device A curved disc joystick or pad with improved performance, reliability and durability can be used as a cursor pointing device for computers, remote controls, video games, consumer electronics, industrial controllers, automotive and other applications. A con... | 09/07/1999 |
| 5554965 | Lubricated variable resistance control having resistive pads on conductive path The present invention provides a lubricated variable resistance control including a substrate having formed thereon an electrical resistance path and an electrical conductive path, and a movable contact electrically bridging the electrical resistance path... | 09/10/1996 |
| 4651123 | Linear potentiometer A linear potentiometer with a sandwich type construction. A pair of conductive strips are carried on a pair of non-conductive flexible plastic substrates which are affixed to a spacer to form a sealed unit. Each substrate includes a pair of tabs which coo... | 03/17/1987 |
| 4644893 | Position indicating apparatus for use in a boat leveling system A boat leveling systems with a pair of trim tabs pivotal between a horizontal position and a downwardly inclined position. Each trim tab is actuatably between the horizontal and inclined positions by a separate fluid motor which includes a cylinder, a pis... | 02/24/1987 |
| 4573106 | Illuminated slide rheostat A slide rheostat having a light-emitting device for permitting a person to check the position of the knob of the rheostat in the nighttime or in the dark. The rheostat includes a transparent upper baseplate, a transparent lower baseplate, a laminated shee... | 02/25/1986 |
| 4333068 | Position transducer A sealed position transducer which is self-wiping and which is readily adaptable for providing both linear and nonlinear electrical outputs. The transducer includes a housing, a resistive element received in the housing, and a flexible membrane, having a ... | 06/01/1982 |
