IP Library › Granted Patent US 4,281,221
Granted Patent Utility
US 4,281,221 · App. 06/056,648

Condenser microphone

Inventor: Vincenzo DelBello
Patented Case View Patent ↗
Granted: Jul 28, 1981 Filed: Jul 11, 1979
Inventor
Vincenzo DelBello
Assignee (at issue)
Societa Italiana Telecomunicazioni Siemens S.p.A.

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Quick Facts
Patent No.
US 4,281,221
App. No.
06/056,648
Filed
1979-07-11
Granted
1981-07-28
Kind
A