RAILWAY TRACK SIGNALLING SYSTEM
United States Patent 3532877
US Patent References:
Rapid transit speed control system
- - 3328580


Inventors:
Thorne-booth, George M.
Publication Date:
10/06/1970
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Assignee:
WESTINGHOUSE ELECTRIC CORP
Primary Class:
246/63C
Other Classes:
246/34CT
International Classes:
B61L3/22; B61L3/00; B61L21/10




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