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2491968
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Patent Grant
2491968
References
Source
Patent Number
2,491,968
Date Filed
Not available
Date Issued
Tuesday, December 20, 1949
74 years ago
CPC
H03J1/20 - the auxiliary power being switched on as long as controlling current is switched on
US Classifications
455 - Telecommunications
200 - Electricity: circuit makers and breakers
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