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Barry L. Smith
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Rochester, NY, US
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last 30 patents
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Patent Grant
Combination frequency loop coupling for railway track signalling
Patent number
4,878,638
Issue date
Nov 7, 1989
General Signal Corporation
James R. Hoelscher
B61 - RAILWAYS
Information
Patent Grant
Microprocessor based track circuit for occupancy detection and bidi...
Patent number
4,498,650
Issue date
Feb 12, 1985
General Signal Corporation
Barry L. Smith
B61 - RAILWAYS
Information
Patent Grant
Non contact isolated current detector
Patent number
4,451,018
Issue date
May 29, 1984
General Signal Corporation
Barry L. Smith
B61 - RAILWAYS
Information
Patent Grant
Audio frequency track circuit for rapid transit applications with s...
Patent number
4,352,475
Issue date
Oct 5, 1982
General Signal Corp.
Barry L. Smith
B61 - RAILWAYS
Information
Patent Grant
Track signalling system
Patent number
4,074,879
Issue date
Feb 21, 1978
General Signal Corporation
Gary E. Clark
B61 - RAILWAYS