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1967945
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Information
Patent Grant
1967945
References
Source
Patent Number
1,967,945
Date Filed
Not available
Date Issued
Tuesday, July 24, 1934
90 years ago
CPC
H01H50/72 - for mercury contact
H01H2300/018 - Application transfer between utility and emergency power supply
Y10T307/615 - Substitute or emergency source
US Classifications
307 - Electrical transmission or interconnection systems
246 - Railway switches and signals
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