John A. McDougal — 19 Patents at Unknown

John A. McDougal has been granted 19 US patents while listed as an inventor at Unknown. The first was granted in 1981 and the most recent in May 1996. John A. McDougal ranks #229,345 of 4,157,543 US inventors in our database (top 5.5%). Patent records list John A. McDougal in Detroit, MI, US.

Issued Patents All Time

Showing 1–19 of 19 patents

Patent #	Title	Co-Inventors	Date
5514314	Spark plug and method	—	1996-05-07
5210458	Spark plug	—	1993-05-11
5133322	Internal combustion engine ignition system and cleaning device	John W. Lennington	1992-07-28
5085192	Internal combustion engine ignition system and cleaning device	John W. Lennington	1992-02-04
5029567	Internal combustion engine ignition system and cleaning device	John W. Lennington	1991-07-09
4993371	Internal combustion engine ignition system and cleaning device	John W. Lennington	1991-02-19
4960093	Internal combustion engine ignition system and cleaning device	John W. Lennington	1990-10-02
4947680	Separation of variables in an ion gap controlled engine	—	1990-08-14
4869175	Impact structures	—	1989-09-26
4837544	Spiral windings	—	1989-06-06
4821697	Fuel octane evaluation system	—	1989-04-18
4809662	Internal combustion engine ignition system	John W. Lennington	1989-03-07
4718381	Internal combustion engine ignition system	John W. Lennington	1988-01-12
4704943	Impact structures	—	1987-11-10
4517540	Spiral windings	—	1985-05-14
4514712	Ignition coil	—	1985-04-30
4471737	Internal combustion engine ignition system	John W. Lennington	1984-09-18
4266421	Vibration sensors for internal combustion engines	—	1981-05-12
4257373	Internal combustion engine ignition system	John W. Lennington	1981-03-24

John A. McDougal — 19 Patents

Issued Patents All Time

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