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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27/00
Central railway traffic control systems; Trackside control; Communication systems specially adapted therefor
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B61L27/10
Operations, e.g. scheduling or time tables
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B61L27/12
Preparing schedules
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