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1883174
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Information
Patent Grant
1883174
References
Source
Patent Number
1,883,174
Date Filed
Not available
Date Issued
Tuesday, October 18, 1932
91 years ago
CPC
H01J17/58 - with more than one cathode or anode
US Classifications
313 - Electric lamp and discharge devices
445 - Electric lamp or space discharge component or device manufacturing
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