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3004151
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Information
Patent Grant
3004151
References
Source
Patent Number
3,004,151
Date Filed
Not available
Date Issued
Tuesday, October 10, 1961
63 years ago
CPC
B61L21/06 - Vehicle-on-line indication Monitoring locking and release of the route
B61L1/187 - Use of alternating current
B61L11/04 - Trailable point locks
US Classifications
246 - Railway switches and signals
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