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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15/00
Indicators provided on the vehicle or train for signalling purposes
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B61L15/0018
Communication with or on the vehicle or train
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B61L15/0027
Radio-based, e.g. using GSM-R
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