Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5880480 | Optical liquid level sensor including built-in test circuitry | Ralph E. Burt, Jerre G. Longfellow, Robert Downing LaClair | 1999-03-09 |
| 5534708 | Optical fuel/air/water sensor and detector circuit | Bruce R. Kline | 1996-07-09 |
| 5182953 | Method and apparatus for shaft torque measurement with temperature compensation | William B. Spillman, Jr., Douglas R. Patriquin | 1993-02-02 |
| 4874245 | Optical shaft angular and torsional displacement and speed sensing system | William B. Spillman, Jr., Robert Rudd, Douglas R. Patriquin, Bruce R. Kline | 1989-10-17 |