Individual holder
DEGRAFFENREID HOWARD T
4 granted patents·172 citations·filing 1980–1986
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
4 records- 0185US4613438ATriangular filter cartridge and apparatusDEGRAFFENREID HOWARD T·Filed 1984·Granted Sep 23, 1986·61 cites·12 claims
- 0274US4715954ATriangular filter cartridge and apparatusDEGRAFFENREID HOWARD T·Filed 1986·Granted Dec 29, 1987·41 cites·4 claims
- 0372US4320005ACoalescer or filter end capDEGRAFFENREID HOWARD T·Filed 1980·Granted Mar 16, 1982·34 cites·8 claims
- 0471US4749485ATriangular filter cartridge having triangular passageDEGRAFFENREID HOWARD T·Filed 1986·Granted Jun 7, 1988·36 cites·3 claims
Join the waitlist — get patent alerts
Get an alert when DEGRAFFENREID HOWARD T files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →