United States Patent 3284796
Inventors:
Borsattino, Vincent S.
Marker, Chursel E.
Morris, Harold L.
Publication Date:
11/08/1966
Assignee:
Borsattino, Vincent S.
Marker, Chursel E.
Morris, Harold L.
Other Classes:
331/47, 331/113R, 340/463
International Classes:
G08B3/10; G08B3/00