United States Patent 2735019
US Patent References:
Electronic device
- - 2211668

Illuminated sign
- - 2240917

Method and apparatus for producing neutrons
- - 2489436


Publication Date:
02/14/1956
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Primary Class:
376/144
Other Classes:
417/48, 376/145, 313/54, 376/129, 310/301, 313/551
International Classes:
H05H3/06; H05H3/00