Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B61
RAILWAYS
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B61K
AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
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9/00
Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
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B61K9/08
Measuring installations for surveying permanent way
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B61K9/10
for detecting cracks in rails or welds thereof
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