Title:
Spherical transducer
United States Patent 2939970


Inventors:
Dranetz, Abraham I.
Cullin, Hugh J.
Application Number:
US47296654A
Publication Date:
06/07/1960
Filing Date:
12/03/1954
Assignee:
GULTON IND INC
Primary Class:
Other Classes:
367/157, 381/173
International Classes:
B06B1/06; H04R17/00
View Patent Images:
Foreign References:
GB191015873A1911-04-13
GB591533A1947-08-21