Point contact negative resistance devices
United States Patent 2469569

Inventors:
Ohl, Russell S.
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Publication Date:
05/10/1949
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Assignee:
BELL TELEPHONE LABOR INC
Primary Class:
331/107R
Other Classes:
29/599, 331/132, 327/571, 330/62, 333/217, 331/117R, 330/61A, 332/178, 257/41, 257/636, 310/318, 329/370, 310/328, 438/694, 330/250, 331/158, 29/825, 438/101
International Classes:
H01L21/00; H01L29/00; H03B7/06; H03C7/02; H03F3/12; H04B3/18; H03B7/00; H03C7/00; H03F3/04; H04B3/04
US Patent References:
1900045Two-way negative resistance repeater
1900018Device for controlling electric current
1875397N/A
1810475Receiver
1792781Method of generating oscillations
1328326Electric circuit
1096142N/A
RE18579N/A
Foreign References:
GB491603A
GB551209A