Title:
Directional transducer
United States Patent 2796467


Inventors:
Kock, Winston E.
Application Number:
US26122251A
Publication Date:
06/18/1957
Filing Date:
12/12/1951
Assignee:
BELL TELEPHONE LABOR INC
Primary Class:
Other Classes:
381/174
International Classes:
H04R19/04
View Patent Images:
US Patent References:
2567407Electroacoustic transducer1951-09-11
2509310Microphone or receiver of the condenser type1950-05-30
2284039Reproduction of sound1942-05-26
2231159Piezoelectric device1941-02-11
2130946Microphone1938-09-20
1777170Acoustic device1930-09-30
1644387Acoustic device1927-10-04
1584613Wave detector1926-05-11