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Patents Grantslast 30 patents

  • Information Patent Grant

    Emergency florescent inverter for magnetic and electronic ballasts

    • Patent number 5,814,971
    • Issue date Sep 29, 1998
    • National Service Industries, Inc.
    • James C. Johnson
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Power supply control circuit for subscriber carrier telephone system

    • Patent number 4,380,687
    • Issue date Apr 19, 1983
    • GTE Automatic Electric Laboratories, Inc.
    • James A. Stewart
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Efficient, high power battery module; D.C. transformers and multi-t...

    • Patent number 4,274,043
    • Issue date Jun 16, 1981
    • The Dow Chemical Company
    • Robert G. Heitz
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    3659179

    • Patent number 3,659,179
    • Issue date Apr 25, 1972
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    2826705

    • Patent number 2,826,705
    • Issue date Mar 11, 1958
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    2478403

    • Patent number 2,478,403
    • Issue date Aug 9, 1949
    • B61 - RAILWAYS
  • Information Patent Grant

    2334823

    • Patent number 2,334,823
    • Issue date Nov 23, 1943
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    2033070

    • Patent number 2,033,070
    • Issue date Mar 3, 1936
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    1911958

    • Patent number 1,911,958
    • Issue date May 30, 1933
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    1882473

    • Patent number 1,882,473
    • Issue date Oct 11, 1932
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    1774873

    • Patent number 1,774,873
    • Issue date Sep 2, 1930
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    1752900

    • Patent number 1,752,900
    • Issue date Apr 1, 1930
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    1711189

    • Patent number 1,711,189
    • Issue date Apr 30, 1929
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    1708865

    • Patent number 1,708,865
    • Issue date Apr 9, 1929
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    1479171

    • Patent number 1,479,171
    • Issue date Jan 1, 1924
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    1436123

    • Patent number 1,436,123
    • Issue date Nov 21, 1922
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    1404890

    • Patent number 1,404,890
    • Issue date Jan 31, 1922
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    1389332

    • Patent number 1,389,332
    • Issue date Aug 30, 1921
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    1362794

    • Patent number 1,362,794
    • Issue date Dec 21, 1920
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    1343765

    • Patent number 1,343,765
    • Issue date Jun 15, 1920
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    1320747

    • Patent number 1,320,747
    • Issue date Nov 4, 1919
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    1285319

    • Patent number 1,285,319
    • Issue date Nov 19, 1918
    • G01 - MEASURING TESTING
  • Information Patent Grant

    1251479

    • Patent number 1,251,479
    • Issue date Jan 1, 1918
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    1240590

    • Patent number 1,240,590
    • Issue date Sep 18, 1917
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    1231991

    • Patent number 1,231,991
    • Issue date Jul 3, 1917
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    1182241

    • Patent number 1,182,241
    • Issue date May 9, 1916
    • G01 - MEASURING TESTING
  • Information Patent Grant

    1140322

    • Patent number 1,140,322
    • Issue date May 18, 1915
    • G01 - MEASURING TESTING
  • Information Patent Grant

    1135494

    • Patent number 1,135,494
    • Issue date Apr 13, 1915
    • G01 - MEASURING TESTING
  • Information Patent Grant

    1123275

    • Patent number 1,123,275
    • Issue date Jan 5, 1915
    • G01 - MEASURING TESTING
  • Information Patent Grant

    1122774

    • Patent number 1,122,774
    • Issue date Dec 29, 1914
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

Patents Applicationslast 30 patents