Title:
Label
United States Patent 2372994

Inventors:
Welch, Thomas R.
Publication Date:
04/03/1945
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Assignee:
Welch, Thomas R.
Primary Class:
206/447
Other Classes:
428/47, 156/249, 40/638, 206/820, 156/268, 156/277, 206/460, 40/316
International Classes:
G09F3/10; H01B7/36; G09F3/02