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| Number | Title | Issue Date |
| 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 |
| 4107642 | Potentiometer joystick A joystick comprising a control handle within which is located an inclination sensitive potentiometer. The potentiometer includes an elongate resistance element and an electrically conductive liquid wiper. Movement of the potentiometer causes the wiper to... | 08/15/1978 |
