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2271685
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Patent Grant
2271685
References
Source
Patent Number
2,271,685
Date Filed
Not available
Date Issued
Tuesday, February 3, 1942
82 years ago
CPC
H01J17/46 - for preventing and then permitting ignition but thereafter having no control
US Classifications
313 - Electric lamp and discharge devices
174 - Electricity: conductors and insulators
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