United States Patent 2424973
Inventors:
Edmonds, Frank W.
Publication Date:
08/05/1947
Assignee:
FED TELEPHONE & RADIO CORP
Other Classes:
336/223, 336/206, 336/67, 336/192, 336/107, 336/100, 336/210, 336/57, 336/60, 336/197, 336/61, 336/12, 336/182, 336/208
International Classes:
H01F30/12; H01F30/06