Inventor · disambiguated record
James W. Sigmon
Also filed as: SIGMON JAMES W
9 granted patents·108 citations·filing 1974–2017
88Inventor score
Top patents by PatentIndex Score
9 records- 0179US3977648ARotary motion valve and actuatorSIGMON CORP·Filed 1974·Granted Aug 31, 1976·36 cites·7 claims
- 0271US4215722ARotary flow regulating valve and methodSIGMON JAMES W·Filed 1976·Granted Aug 5, 1980·25 cites·7 claims
- 0350US5029517AVaneless rotary airlock valveSIGMON JAMES W·Filed 1988·Granted Jul 9, 1991·12 cites·9 claims
- 0444US10287110B1Compression-loaded plastic rotorsSIGMON JAMES W·Filed 2017·Granted May 14, 2019·0 cites·26 claims
- 0541US4295633AExpansible deviceSIGMON JAMES W·Filed 1979·Granted Oct 20, 1981·8 cites·24 claims
- 0639US4782741AVaneless rotary airlock valveSIGMON JAMES W·Filed 1987·Granted Nov 8, 1988·7 cites·18 claims
- 0736US5431311ARotary airlock valve using a single seatFiled 1993·Granted Jul 11, 1995·7 cites·14 claims
- 0835US5163656AVaneless rotary airlock valveSIGMON JAMES W·Filed 1991·Granted Nov 17, 1992·7 cites·7 claims
- 0928US4467701AExpansible deviceSIGMON COMPANY·Filed 1981·Granted Aug 28, 1984·6 cites·16 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →