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2176600
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Information
Patent Grant
2176600
References
Source
Patent Number
2,176,600
Date Filed
Not available
Date Issued
Tuesday, October 17, 1939
85 years ago
CPC
B61L7/086 - Common line wire control using relay distributors
US Classifications
246 - Railway switches and signals
200 - Electricity: circuit makers and breakers
340 - Communications: electrical
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