Individual holder
PROPP CARL F
US·3 granted patents·70 citations·filing 1974–1990
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
3 records- 0169US5043065AVariable draft oil/debris skimming vesselPROPP CARL F·Filed 1990·Granted Aug 27, 1991·41 cites·4 claims
- 0254US4048070AOil and waste water reception facility and processPROPP CARL F·Filed 1976·Granted Sep 13, 1977·16 cites·5 claims
- 0352US4054525AOil skimming apparatusPROPP CARL F·Filed 1974·Granted Oct 18, 1977·13 cites·9 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →