Individual holder
SHAFFER DONALD J
5 granted patents·113 citations·filing 1979–1982
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
5 records- 0187US4210107ATuneable intake manifoldSHAFFER DONALD J·Filed 1979·Granted Jul 1, 1980·46 cites·12 claims
- 0282US4274368ATuneable intake manifoldSHAFFER DONALD J·Filed 1980·Granted Jun 23, 1981·36 cites·9 claims
- 0363US4553507AEngine with additional shared flow control runner for two cylindersSHAFFER DONALD J·Filed 1982·Granted Nov 19, 1985·19 cites·8 claims
- 0452US4381738AEngine with additional shared flow control runner for two cylindersSHAFFER DONALD J·Filed 1980·Granted May 3, 1983·9 cites·34 claims
- 0533US4232639AEngine with additional shared flow control runner for two cylindersSHAFFER DONALD J·Filed 1979·Granted Nov 11, 1980·3 cites·9 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →