Search Images Maps Play YouTube News Gmail Drive More »
Advanced Patent Search | Web History | Sign in

Patents

Referenced by

Citing PatentFiling dateIssue dateOriginal AssigneeTitle
US433474024 Apr 197915 Jun 1982Polaroid CorporationReceiving system having pre-selected directional response
US474254820 Dec 19843 May 1988American Telephone and Telegraph Company
Bell Telephone Laboratories, Incorporated
Unidirectional second order gradient microphone
US51704352 Mar 19928 Dec 1992Bose CorporationWaveguide electroacoustical transducing
US58091534 Dec 199615 Sep 1998Bose CorporationElectroacoustical transducing
US71167925 Jul 20003 Oct 2006GN Resound North America CorporationDirectional microphone system