Issued Patents All Time
Showing 26–40 of 40 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5211147 | Reverse stratified, ignition controlled, emissions best timing lean burn engine | — | 1993-05-18 |
| 5207208 | Integrated converter high power CD ignition | — | 1993-05-04 |
| 5131376 | Distributorless capacitive discharge ignition system | Winfield Hill, Fred Robert Kern | 1992-07-21 |
| 5049263 | Fluid strainer with blockage detection | James R. Hoffman | 1991-09-17 |
| 5047157 | Coolant filtration | James R. Hoffman | 1991-09-10 |
| 4868730 | DC to DC converter current pump | — | 1989-09-19 |
| 4841925 | Enhanced flame ignition for hydrocarbon fuels | — | 1989-06-27 |
| 4774914 | Electromagnetic ignition--an ignition system producing a large size and intense capacitive and inductive spark with an intense electromagnetic field feeding the spark | — | 1988-10-04 |
| 4688538 | Rapid pulsed multiple pulse ignition and high efficiency power inverter with controlled output characteristics | Robert P. Lefevre | 1987-08-25 |
| 4677960 | High efficiency voltage doubling ignition coil for CD system producing pulsed plasma type ignition | — | 1987-07-07 |
| 4561406 | Winged reentrant electromagnetic combustion chamber | — | 1985-12-31 |
| 4499872 | Ultra lean burn carburetted adiabatic engine | Robert P. Lefevre | 1985-02-19 |
| 4317068 | Plasma jet ignition system | Tai-Te Wu | 1982-02-23 |
| 4297983 | Spherical reentrant chamber | — | 1981-11-03 |
| 4230448 | Burner combustion improvements | Fred Robert Kern | 1980-10-28 |