Assignee
SIGMA TEK INC
US·3 granted patents·87 citations·filing 1982–1991
Top patents by PatentIndex Score
3 records- 0175US4820140ASelf-lubricating rotary vane pumpSIGMA TEK INC·Filed 1987·Granted Apr 11, 1989·40 cites·1 claims
- 0274US5181844ARotary vane pump with carbon/carbon vanesSIGMA TEK INC·Filed 1991·Granted Jan 26, 1993·43 cites·4 claims
- 0326US4469473AReciprocating piston apparatusSIGMA TEK INC·Filed 1982·Granted Sep 4, 1984·4 cites·28 claims
Join the waitlist — get patent alerts
Get an alert when SIGMA TEK INC 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 →