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Fixed block track circuit
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Patent number 9,610,958
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Issue date Apr 4, 2017
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CHINA ENGINEERING CONSULTANTS, INC.
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Hsun-Jung Cho
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B61 - RAILWAYS
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Signal control system
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Patent number 4,369,942
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Issue date Jan 25, 1983
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Safetran Systems Corporation
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H. James Wilson
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B61 - RAILWAYS
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3267280
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Patent number 3,267,280
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Issue date Aug 16, 1966
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H03 - BASIC ELECTRONIC CIRCUITRY
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3145957
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Patent number 3,145,957
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Issue date Aug 25, 1964
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B61 - RAILWAYS
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3108771
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Patent number 3,108,771
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Issue date Oct 29, 1963
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B61 - RAILWAYS
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3054889
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Patent number 3,054,889
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Issue date Sep 18, 1962
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B61 - RAILWAYS
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2895042
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Patent number 2,895,042
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Issue date Jul 14, 1959
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B61 - RAILWAYS
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2895043
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Patent number 2,895,043
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Issue date Jul 14, 1959
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B61 - RAILWAYS
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2817011
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Patent number 2,817,011
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Issue date Dec 17, 1957
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B61 - RAILWAYS
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2768285
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Patent number 2,768,285
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Issue date Oct 23, 1956
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B61 - RAILWAYS
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2754414
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Patent number 2,754,414
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Issue date Jul 10, 1956
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B61 - RAILWAYS
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2655594
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Patent number 2,655,594
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Issue date Oct 13, 1953
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B61 - RAILWAYS
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2654831
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Patent number 2,654,831
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Issue date Oct 6, 1953
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B61 - RAILWAYS
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2572234
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Patent number 2,572,234
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Issue date Oct 23, 1951
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B61 - RAILWAYS
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2564781
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Patent number 2,564,781
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Issue date Aug 21, 1951
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B61 - RAILWAYS
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2419258
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Patent number 2,419,258
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Issue date Apr 22, 1947
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B61 - RAILWAYS
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2370620
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Patent number 2,370,620
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Issue date Mar 6, 1945
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B61 - RAILWAYS
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2367729
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Patent number 2,367,729
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Issue date Jan 23, 1945
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B61 - RAILWAYS
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2350699
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Patent number 2,350,699
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Issue date Jun 6, 1944
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B61 - RAILWAYS
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2347533
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Patent number 2,347,533
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Issue date Apr 25, 1944
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B61 - RAILWAYS
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2316929
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Patent number 2,316,929
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Issue date Apr 20, 1943
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B61 - RAILWAYS
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2313468
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Patent number 2,313,468
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Issue date Mar 9, 1943
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B61 - RAILWAYS
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2313475
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Patent number 2,313,475
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Issue date Mar 9, 1943
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B61 - RAILWAYS
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2312059
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Patent number 2,312,059
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Issue date Feb 23, 1943
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B61 - RAILWAYS
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2311034
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Patent number 2,311,034
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Issue date Feb 16, 1943
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B61 - RAILWAYS
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2285881
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Patent number 2,285,881
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Issue date Jun 9, 1942
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B61 - RAILWAYS
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2274289
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Patent number 2,274,289
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Issue date Feb 24, 1942
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B61 - RAILWAYS
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2272789
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Patent number 2,272,789
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Issue date Feb 10, 1942
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B61 - RAILWAYS
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2264091
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Patent number 2,264,091
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Issue date Nov 25, 1941
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B61 - RAILWAYS