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2201819
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Information
Patent Grant
2201819
References
Source
Patent Number
2,201,819
Date Filed
Not available
Date Issued
Tuesday, May 21, 1940
84 years ago
CPC
H01J21/36 - Tubes with flat electrodes
H01J3/025 - Electron guns using a discharge in a gas or a vapour as electron source
H01J17/50 - Thermionic-cathode tubes
H01J2893/0062 - Tubes with temperature ionized gas as electron source
US Classifications
313 - Electric lamp and discharge devices
417 - Pumps
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