United States Patent 1921112
Inventors:
Apple, Herbert F.
Apple, Edward M.
Gourley, Darroch
Publication Date:
08/08/1933
Assignee:
Apple, Herbert F.
Apple, Edward M.
Gourley, Darroch
Other Classes:
310/43, 264/272.200, 310/235
International Classes:
H02K15/12