Title:
Electrical switching apparatus
United States Patent 1799651


Inventors:
Siegmund, Humphreys O.
Application Number:
US32227228A
Publication Date:
04/07/1931
Filing Date:
11/27/1928
Assignee:
BELL TELEPHONE LABOR INC
Primary Class:
Other Classes:
200/275, 200/283
International Classes:
H01H50/54
View Patent Images: