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using comparison with a surface of graded brightness

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  • G01J1/14
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GPHYSICS G01Measuring instruments G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT COLORIMETRY RADIATION PYROMETRY G01J1/00Photometry

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G01J1/14using comparison with a surface of graded brightness
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Patents Grantslast 30 patents

  • Information Patent Grant

    Light melanopic activity indicator
    • Patent number 11,118,963
    • Issue date Sep 14, 2021
    • SIGNIFY HOLDING B.V.
    • Tobias Borra
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Step tablet
    • Patent number 4,588,298
    • Issue date May 13, 1986
    • Fuji Photo Film Co., Ltd.
    • Masao Nakamura
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    3779755
    • Patent number 3,779,755
    • Issue date Dec 18, 1973
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    3718397
    • Patent number 3,718,397
    • Issue date Feb 27, 1973
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    3205767
    • Patent number 3,205,767
    • Issue date Sep 14, 1965
    • G02 - OPTICS
  • Information Patent Grant

    2399992
    • Patent number 2,399,992
    • Issue date May 7, 1946
    • G01 - MEASURING TESTING
  • Information Patent Grant

    2379103
    • Patent number 2,379,103
    • Issue date Jun 26, 1945
    • G01 - MEASURING TESTING
  • Information Patent Grant

    2371559
    • Patent number 2,371,559
    • Issue date Mar 13, 1945
    • G01 - MEASURING TESTING
  • Information Patent Grant

    2354545
    • Patent number 2,354,545
    • Issue date Jul 25, 1944
    • G01 - MEASURING TESTING
  • Information Patent Grant

    2342061
    • Patent number 2,342,061
    • Issue date Feb 15, 1944
    • G01 - MEASURING TESTING
  • Information Patent Grant

    2340141
    • Patent number 2,340,141
    • Issue date Jan 25, 1944
    • G01 - MEASURING TESTING
  • Information Patent Grant

    2337534
    • Patent number 2,337,534
    • Issue date Dec 28, 1943
    • G01 - MEASURING TESTING
  • Information Patent Grant

    2323676
    • Patent number 2,323,676
    • Issue date Jul 6, 1943
    • G01 - MEASURING TESTING
  • Information Patent Grant

    2322044
    • Patent number 2,322,044
    • Issue date Jun 15, 1943
    • G01 - MEASURING TESTING
  • Information Patent Grant

    2226167
    • Patent number 2,226,167
    • Issue date Dec 24, 1940
    • G01 - MEASURING TESTING
  • Information Patent Grant

    2197194
    • Patent number 2,197,194
    • Issue date Apr 16, 1940
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    2094158
    • Patent number 2,094,158
    • Issue date Sep 28, 1937
    • G01 - MEASURING TESTING
  • Information Patent Grant

    1979719
    • Patent number 1,979,719
    • Issue date Nov 6, 1934
    • G01 - MEASURING TESTING
  • Information Patent Grant

    1858340
    • Patent number 1,858,340
    • Issue date May 17, 1932
    • G01 - MEASURING TESTING
  • Information Patent Grant

    1697928
    • Patent number 1,697,928
    • Issue date Jan 8, 1929
    • G01 - MEASURING TESTING
  • Information Patent Grant

    1649964
    • Patent number 1,649,964
    • Issue date Nov 22, 1927
    • G01 - MEASURING TESTING
  • Information Patent Grant

    1621991
    • Patent number 1,621,991
    • Issue date Mar 22, 1927
    • G01 - MEASURING TESTING
  • Information Patent Grant

    1598022
    • Patent number 1,598,022
    • Issue date Aug 31, 1926
    • G01 - MEASURING TESTING
  • Information Patent Grant

    1331062
    • Patent number 1,331,062
    • Issue date Feb 17, 1920
    • G01 - MEASURING TESTING
  • Information Patent Grant

    280665
    • Patent number 280,665
    • Issue date Jul 3, 1883
    • G01 - MEASURING TESTING

Patents Applicationslast 30 patents

  • Information Patent Application

    LIGHT MELANOPIC ACTIVITY INDICATOR
    • Publication number 20200370952
    • Publication date Nov 26, 2020
    • SIGNIFY HOLDING B.V.
    • Tobias BORRA
    • G01 - MEASURING TESTING