Patents per Year
Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 6467469 | EGR valve position control system | Chang Yang, Gregory R. White, Yue Wang, John M. Janssen, Ray C. Hatton | 2002-10-22 | $2,624,000 |
| 5752482 | System for integrally controlling current flow through number of inductive loads | Leslie A. Roettgen, William D. Meyer, Bryce Himebaugh | 1998-05-19 | $5,356,000 |
| 4486703 | Boost voltage generator | — | 1984-12-04 | |
| 4479161 | Switching type driver circuit for fuel injector | John A. Walworth | 1984-10-23 | |
| 4338651 | Dual coil driver | — | 1982-07-06 | $1,350,000 |
| 4263652 | Oxygen sensor signal conditioner | — | 1981-04-21 | $2,331,000 |
| 4258324 | Signal conditioning circuit for magnetic sensing means | — | 1981-03-24 | $1,455,000 |
| 4245314 | Oxygen sensor qualifier | Thomas W. Hartford, James A. Kessler | 1981-01-13 | $1,656,000 |
| 4245315 | Ignition limp home circuit for electronic engine control systems | Alan W. Barman, Thomas W. Hartford | 1981-01-13 | $1,656,000 |