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Chain of custody
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Patent number 7,188,009
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Issue date Mar 6, 2007
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New York Air Brake Corporation
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Michael J. Hawthorne
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B61 - RAILWAYS
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Enhanced distributed power
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Patent number 5,950,967
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Issue date Sep 14, 1999
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Westinghouse Air Brake Company
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Stephen R. Montgomery
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B60 - VEHICLES IN GENERAL
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3805056
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Patent number 3,805,056
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Issue date Apr 16, 1974
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B61 - RAILWAYS
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3788234
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Patent number 3,788,234
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Issue date Jan 29, 1974
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B61 - RAILWAYS
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3569925
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Patent number 3,569,925
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Issue date Mar 9, 1971
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B61 - RAILWAYS
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1554113
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Patent number 1,554,113
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Issue date Sep 15, 1925
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B61 - RAILWAYS
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1424509
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Patent number 1,424,509
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Issue date Aug 1, 1922
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B61 - RAILWAYS