Individual holder
DUCKWORTH CHARLES E
3 granted patents·57 citations·filing 1978–1983
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
3 records- 0180US4200062ASafety switch for hydrogen generator systemDUCKWORTH CHARLES E·Filed 1978·Granted Apr 29, 1980·23 cites·5 claims
- 0265US4192266ACooling system for internal combustion engineDUCKWORTH CHARLES E·Filed 1978·Granted Mar 11, 1980·13 cites·6 claims
- 0362US4476841AVapor injection system for internal combustion engineDUCKWORTH CHARLES E·Filed 1983·Granted Oct 16, 1984·21 cites·5 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →