United States Patent 2468225
Inventors:
Murphy, Louis N.
Publication Date:
04/26/1949
Assignee:
Murphy, Louis N.
Other Classes:
313/11.500, 313/45, 174/138F, 174/77S
International Classes:
H01T13/05; H01T13/06; H01T13/00
Foreign References:
| CH212508A | | | | |
| GB290820A | | | | |
| IT313296B | | | | |