Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B61
RAILWAYS
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B61L
GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
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1/00
Devices along the route controlled by interaction with the vehicle or train
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B61L1/02
Electric devices associated with track; , e.g. rail contacts
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B61L1/04
mechanically actuated by a part of the vehicle
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