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1345626
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Patent Grant
1345626
References
Source
Patent Number
1,345,626
Date Filed
Not available
Date Issued
Tuesday, July 6, 1920
104 years ago
CPC
G08B9/04 - Means for recording operation of the apparatus
US Classifications
340 - Communications: electrical
116 - Signals and indicators
200 - Electricity: circuit makers and breakers
346 - Recorders
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