using direct current

Patents Grantslast 30 patents

  • Information Patent Grant

    Fixed block track circuit

    • Patent number 9,610,958
    • Issue date Apr 4, 2017
    • CHINA ENGINEERING CONSULTANTS, INC.
    • Hsun-Jung Cho
    • B61 - RAILWAYS
  • Information Patent Grant

    Railway code generation and signaling system and method

    • Patent number 9,391,820
    • Issue date Jul 12, 2016
    • ALSTOM TRANSPORT TECHNOLOGIES
    • James Michael Kiss
    • B61 - RAILWAYS
  • Information Patent Grant

    Signal control system

    • Patent number 4,369,942
    • Issue date Jan 25, 1983
    • Safetran Systems Corporation
    • H. James Wilson
    • B61 - RAILWAYS
  • Information Patent Grant

    3267280

    • Patent number 3,267,280
    • Issue date Aug 16, 1966
    • H03 - BASIC ELECTRONIC CIRCUITRY
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    3145957

    • Patent number 3,145,957
    • Issue date Aug 25, 1964
    • B61 - RAILWAYS
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    3108771

    • Patent number 3,108,771
    • Issue date Oct 29, 1963
    • B61 - RAILWAYS
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    3054889

    • Patent number 3,054,889
    • Issue date Sep 18, 1962
    • B61 - RAILWAYS
  • Information Patent Grant

    2895042

    • Patent number 2,895,042
    • Issue date Jul 14, 1959
    • B61 - RAILWAYS
  • Information Patent Grant

    2895043

    • Patent number 2,895,043
    • Issue date Jul 14, 1959
    • B61 - RAILWAYS
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    2817011

    • Patent number 2,817,011
    • Issue date Dec 17, 1957
    • B61 - RAILWAYS
  • Information Patent Grant

    2768285

    • Patent number 2,768,285
    • Issue date Oct 23, 1956
    • B61 - RAILWAYS
  • Information Patent Grant

    2754414

    • Patent number 2,754,414
    • Issue date Jul 10, 1956
    • B61 - RAILWAYS
  • Information Patent Grant

    2655594

    • Patent number 2,655,594
    • Issue date Oct 13, 1953
    • B61 - RAILWAYS
  • Information Patent Grant

    2654831

    • Patent number 2,654,831
    • Issue date Oct 6, 1953
    • B61 - RAILWAYS
  • Information Patent Grant

    2572234

    • Patent number 2,572,234
    • Issue date Oct 23, 1951
    • B61 - RAILWAYS
  • Information Patent Grant

    2564781

    • Patent number 2,564,781
    • Issue date Aug 21, 1951
    • B61 - RAILWAYS
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    2419258

    • Patent number 2,419,258
    • Issue date Apr 22, 1947
    • B61 - RAILWAYS
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    2370620

    • Patent number 2,370,620
    • Issue date Mar 6, 1945
    • B61 - RAILWAYS
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    2367729

    • Patent number 2,367,729
    • Issue date Jan 23, 1945
    • B61 - RAILWAYS
  • Information Patent Grant

    2350699

    • Patent number 2,350,699
    • Issue date Jun 6, 1944
    • B61 - RAILWAYS
  • Information Patent Grant

    2347533

    • Patent number 2,347,533
    • Issue date Apr 25, 1944
    • B61 - RAILWAYS
  • Information Patent Grant

    2316929

    • Patent number 2,316,929
    • Issue date Apr 20, 1943
    • B61 - RAILWAYS
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    2313468

    • Patent number 2,313,468
    • Issue date Mar 9, 1943
    • B61 - RAILWAYS
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    2313475

    • Patent number 2,313,475
    • Issue date Mar 9, 1943
    • B61 - RAILWAYS
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    2312059

    • Patent number 2,312,059
    • Issue date Feb 23, 1943
    • B61 - RAILWAYS
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    2311034

    • Patent number 2,311,034
    • Issue date Feb 16, 1943
    • B61 - RAILWAYS
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    2285881

    • Patent number 2,285,881
    • Issue date Jun 9, 1942
    • B61 - RAILWAYS
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    2274289

    • Patent number 2,274,289
    • Issue date Feb 24, 1942
    • B61 - RAILWAYS
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    2272789

    • Patent number 2,272,789
    • Issue date Feb 10, 1942
    • B61 - RAILWAYS
  • Information Patent Grant

    2264091

    • Patent number 2,264,091
    • Issue date Nov 25, 1941
    • B61 - RAILWAYS

Patents Applicationslast 30 patents