Individual holder
PERKINS CHARLES M
US·4 granted patents·40 citations·filing 1976–1980
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
4 records- 0163US4165787AInvertible plow constructionPERKINS CHARLES M·Filed 1978·Granted Aug 28, 1979·13 cites·3 claims
- 0255US4015878AChair construction for long use comfortPERKINS CHARLES M·Filed 1976·Granted Apr 5, 1977·19 cites·8 claims
- 0333US4336771ASolid fuel burning internal combustion enginePERKINS CHARLES M·Filed 1980·Granted Jun 29, 1982·6 cites·8 claims
- 0426US4170202AInternal combustion enginePERKINS CHARLES M·Filed 1977·Granted Oct 9, 1979·2 cites·1 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →