Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6809542 | Wafer resistance measurement apparatus and method using capacitively coupled AC excitation signal | — | 2004-10-26 |
| 5703424 | Bias current control circuit | — | 1997-12-30 |
| 5133527 | Active mounts | Hsiang Ming Chen, Paul Lewis, Donald Wilson | 1992-07-28 |
| 4761609 | Tachometer signal conditioner | Donald E. Welch | 1988-08-02 |
| 4758065 | Fiber optic sensor probe | Gregory Hull-Allen | 1988-07-19 |
| 4751381 | Fast dither detector for fiber optic sensor | — | 1988-06-14 |
| 4719409 | Digital signal output capacitance sensor displacement gauging system | — | 1988-01-12 |
| 4694474 | High speed counter for thin objects | Robert E. Johnson | 1987-09-15 |
| 4674882 | Precision optical displacement measuring instrument using servo controlled fiber optic sensor | Curtis D. Kissinger, Leo Hoogenboom, Gregory Hull-Allen, Samuel Fallek | 1987-06-23 |
| 4488813 | Reflectivity compensating system for fiber optic sensor employing dual probes at a fixed gap differential | Curtis D. Kissinger | 1984-12-18 |
| 4353220 | Resonant piston compressor having improved stroke control for load-following electric heat pumps and the like | Peter W. Curwen | 1982-10-12 |
| 4345442 | Control system for resonant free-piston variable stroke compressor for load-following electric heat pumps and the like | — | 1982-08-24 |
| 4291258 | DC Excitation control for linear oscillating motors | Howard L. Clark, Paul R. Back | 1981-09-22 |
| 4254331 | Calibration circuit for fiber optic proximity instrument | Curtis D. Kissinger | 1981-03-03 |