Individual holder
SIGMON JAMES W
6 granted patents·59 citations·filing 1976–2017
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
6 records- 0171US4215722ARotary flow regulating valve and methodSIGMON JAMES W·Filed 1976·Granted Aug 5, 1980·25 cites·7 claims
- 0250US5029517AVaneless rotary airlock valveSIGMON JAMES W·Filed 1988·Granted Jul 9, 1991·12 cites·9 claims
- 0344US10287110B1Compression-loaded plastic rotorsSIGMON JAMES W·Filed 2017·Granted May 14, 2019·0 cites·26 claims
- 0441US4295633AExpansible deviceSIGMON JAMES W·Filed 1979·Granted Oct 20, 1981·8 cites·24 claims
- 0539US4782741AVaneless rotary airlock valveSIGMON JAMES W·Filed 1987·Granted Nov 8, 1988·7 cites·18 claims
- 0635US5163656AVaneless rotary airlock valveSIGMON JAMES W·Filed 1991·Granted Nov 17, 1992·7 cites·7 claims
Join the waitlist — get patent alerts
Get an alert when SIGMON JAMES W 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 →