Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6694934 | Variable valve actuator for internal combustion engine | David M. Preston, Donald Haefner | 2004-02-24 |
| 5682846 | Engine valve actuator with differential area pistons | — | 1997-11-04 |
| 4969432 | Torch ignitor for lean burn engines | Lyle O. Hoppie, Donald Haefner | 1990-11-13 |
| 4970427 | Electrode arrangement for establishing a sustained electrical arc | Lyle O. Hoppie, Donald Haefner | 1990-11-13 |
| 4865003 | Method and apparatus for activating fuel prior to combustion | Lyle O. Hoppie, Donald Haefner | 1989-09-12 |
| 4726336 | UV irradiation apparatus and method for fuel pretreatment enabling hypergolic combustion | Lyle O. Hoppie, Richard Chute, Kenneth P. Waichunas | 1988-02-23 |
| 4672938 | Method and apparatus for multiphasic pretreatment of fuel to achieve hypergolic combustion | Lyle O. Hoppie, Richard Chute, Kenneth P. Waichunas | 1987-06-16 |
| 4669433 | Regenerative fuel heating apparatus and method for hypergolic combustion | Lyle O. Hoppie, Richard Chute, Kenneth P. Waichunas | 1987-06-02 |
| 4644925 | Apparatus and method for compressive heating of fuel to achieve hypergolic combustion | Lyle O. Hoppie, Richard Chute, Kenneth P. Waichunas | 1987-02-24 |