Individual holder
COWAN PHILIP L
US·4 granted patents·46 citations·filing 1987–1990
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
4 records- 0166US4723892AConstant power variable volume pumpCOWAN PHILIP L·Filed 1987·Granted Feb 9, 1988·25 cites·15 claims
- 0246US5051074ABi-directional reciprocating pump mechanismCOWAN PHILIP L·Filed 1990·Granted Sep 24, 1991·15 cites·19 claims
- 0332US4870890AAutomatic reversing valveCOWAN PHILIP L·Filed 1988·Granted Oct 3, 1989·6 cites·27 claims
- 0425US5090437ALow friction proportional unloading valveCOWAN PHILIP L·Filed 1990·Granted Feb 25, 1992·0 cites·13 claims
Join the waitlist — get patent alerts
Get an alert when COWAN PHILIP L 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 →