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2162859
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Patent Grant
2162859
References
Source
Patent Number
2,162,859
Date Filed
Not available
Date Issued
Tuesday, June 20, 1939
85 years ago
CPC
B61L1/182 - Use of current of indifferent sort or a combination of different current types
US Classifications
246 - Railway switches and signals
307 - Electrical transmission or interconnection systems
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