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1380206
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Information
Patent Grant
1380206
References
Source
Patent Number
1,380,206
Date Filed
Not available
Date Issued
Tuesday, May 31, 1921
103 years ago
CPC
H01J21/16 - with external electrostatic control means and with or without internal control electrodes
US Classifications
329 - Demodulators
313 - Electric lamp and discharge devices
315 - Electric lamp and discharge devices: systems
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