The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 02, 1980
Filed:
Oct. 18, 1978
Applicant:
Inventors:
John G Bunting, Ipswich, GB;
Robin C Cross, Felixstowe, GB;
David R Guard, Ipswich, GB;
Ian S Groves, Ipswich, GB;
Edward G Johnson, Woodbridge, GB;
Alan E Stevens, Ipswich, GB;
Assignee:
The Post Office, London, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04M / ; H04R / ;
U.S. Cl.
CPC ...
179 / ; 179 / ; 179 / ;
Abstract
An electro-acoustic terminal unit for use in an audio teleconferencing system comprises a loudspeaker and one or more microphones each having a sensitivity which is directionally dependent and exhibits at least one null or substantially null position. The loudspeaker and microphones are rigidly mounted on a boom and the microphones are so located and orientated relative to the loudspeaker that the null position is directed towards the loudspeaker.