Patents per Year
Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 7021275 | Igniter for internal combustion engines operating over a wide range of air fuel ratios | — | 2006-04-04 | |
| 6588392 | Fuel efficient powertrain system | Donald John Armstrong | 2003-07-08 | $1,459,000 |
| 6509676 | Spark plug construction for enhanced heat transfer | — | 2003-01-21 | $1,842,000 |
| 6359377 | Spark plug with engine cylinder pressure sensor | — | 2002-03-19 | |
| 6213085 | Directed jet spark plug | Joseph Ralph | 2001-04-10 | $6,969,000 |
| 6192324 | On-board diagnosis of emissions from catalytic converters | David K. Lambert, Galen B. Fisher | 2001-02-20 | |
| 5421300 | Torch jet spark plug | Robert Johnston, Kaius K. Polikarpus | 1995-06-06 | |
| 5405280 | Integrated molding and inking process for forming a torch jet spark plug | Kaius K. Polikarpus | 1995-04-11 | |
| 4302057 | Pneumatic control valve | — | 1981-11-24 | $790,000 |
| 4204555 | Exhaust valve assembly | — | 1980-05-27 | $1,926,000 |
| 4191428 | Air brake system with pressure holding valve | — | 1980-03-04 | $974,000 |