McDougal; John A.
Patent Applications and Registrations
Patent applications and USPTO patent grants for McDougal; John A..The latest application filed is for "spark plug and method".
- McDougal; John A. - Detroit MI
- McDougal; John A. - Flint MI
| Patent | Date |
|---|---|
| Spark plug and method Grant 5,514,314 - McDougal May 7, 1 | 1996-05-07 |
| Internal combustion engine ignition system and cleaning device Grant 5,133,322 - McDougal , et al. July 28, 1 | 1992-07-28 |
| Internal combustion engine ignition system and cleaning device Grant 4,993,371 - McDougal , et al. February 19, 1 | 1991-02-19 |
| Separation of variables in an ion gap controlled engine Grant 4,947,680 - McDougal August 14, 1 | 1990-08-14 |
| Impact structures Grant 4,869,175 - McDougal September 26, 1 | 1989-09-26 |
| Spiral windings Grant 4,837,544 - McDougal June 6, 1 | 1989-06-06 |
| Fuel octane evaluation system Grant 4,821,697 - McDougal April 18, 1 | 1989-04-18 |
| Impact structures Grant 4,704,943 - McDougal November 10, 1 | 1987-11-10 |
| Vibration sensors for internal combustion engines Grant 4,266,421 - McDougal May 12, 1 | 1981-05-12 |
| Internal combustion engine ignition system Grant 4,257,373 - McDougal , et al. March 24, 1 | 1981-03-24 |
| Autopilot system Grant 3,919,961 - McDougal November 18, 1 | 1975-11-18 |
| Magnetic heading reference Grant 3,907,431 - McDougal September 23, 1 | 1975-09-23 |
| Internal combustion engine ignition system and cleaning device Grant 3,903,856 - McDougal , et al. September 9, 1 | 1975-09-09 |
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