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| Number | Title | Issue Date |
| 7079005 | Mechanically buffered contact wiper An electric device contains a medium interposed between first and second electric elements to provide electric continuity between the first element and a defined reference point of the second element throughout a defined range of sliding travel of one of the element... | 07/18/2006 |
| 4123741 | Resistance element for variable resistors A resistance element for obtaining a continuous and linear output characteristic is obtained by the combination of a zig-zag resistance element and a resistance film of higher resistivity disposed thereover.... | 10/31/1978 |
