Assignee
LECTRET SA
CH·8 granted patents·306 citations·filing 1978–1992
Top patents by PatentIndex Score
8 records- 0185US4993072AShielded electret transducer and method of making the sameLECTRET SA·Filed 1989·Granted Feb 12, 1991·99 cites·9 claims
- 0277US4764690AElectret transducingLECTRET SA·Filed 1986·Granted Aug 16, 1988·79 cites·16 claims
- 0370US4170185APreventing marine foulingLECTRET SA·Filed 1978·Granted Oct 9, 1979·21 cites·6 claims
- 0459US5208789ACondenser microphones based on silicon with humidity resistant surface treatmentLECTRET SA·Filed 1992·Granted May 4, 1993·37 cites·12 claims
- 0559US4331840AElectret transducer with tapered acoustic chamberLECTRET SA·Filed 1980·Granted May 25, 1982·30 cites·1 claims
- 0647US4469920APiezoelectric film device for conversion between digital electric signals and analog acoustic signalsLECTRET SA·Filed 1983·Granted Sep 4, 1984·15 cites·2 claims
- 0747US4295010APlural piezoelectric polymer film acoustic transducerLECTRET SA·Filed 1980·Granted Oct 13, 1981·15 cites·15 claims
- 0841US4453044AElectro-acoustic transducer with plural piezoelectric filmLECTRET SA·Filed 1983·Granted Jun 5, 1984·10 cites·7 claims
Join the waitlist — get patent alerts
Get an alert when LECTRET SA 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 →