TREA

Adjusting the duration of signals

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  • CPC
  • G04C21/38
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Parent Industries

GPHYSICS G04Horology G04CELECTROMECHANICAL CLOCKS OR WATCHES G04C21/00Producing acoustic time signals by electrical means

Current Industry

G04C21/38Adjusting the duration of signals
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Patents Grantslast 30 patents

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    Wake-up device
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    • Igor Berezhnyy
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    Timer device
    • Patent number 4,137,703
    • Issue date Feb 6, 1979
    • Copal Company Limited
    • Jusuke Yaginuma
    • G04 - HOROLOGY
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    Unlocking mechanism
    • Patent number 4,000,384
    • Issue date Dec 28, 1976
    • Kabushiki Kaisha Seikosha
    • Shoichiro Kumazawa
    • G04 - HOROLOGY
  • Information Patent Grant

    3881075
    • Patent number 3,881,075
    • Issue date Apr 29, 1975
    • G04 - HOROLOGY
  • Information Patent Grant

    3652814
    • Patent number 3,652,814
    • Issue date Mar 28, 1972
    • G04 - HOROLOGY
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    3603075
    • Patent number 3,603,075
    • Issue date Sep 7, 1971
    • G04 - HOROLOGY
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    3541776
    • Patent number 3,541,776
    • Issue date Nov 24, 1970
    • G04 - HOROLOGY
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    3498047
    • Patent number 3,498,047
    • Issue date Mar 3, 1970
    • G04 - HOROLOGY
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    3348008
    • Patent number 3,348,008
    • Issue date Oct 17, 1967
    • G04 - HOROLOGY
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    3339034
    • Patent number 3,339,034
    • Issue date Aug 29, 1967
    • G04 - HOROLOGY
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    3327074
    • Patent number 3,327,074
    • Issue date Jun 20, 1967
    • G04 - HOROLOGY
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    3324644
    • Patent number 3,324,644
    • Issue date Jun 13, 1967
    • G04 - HOROLOGY
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    3192700
    • Patent number 3,192,700
    • Issue date Jul 6, 1965
    • G04 - HOROLOGY
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    2856751
    • Patent number 2,856,751
    • Issue date Oct 21, 1958
    • G04 - HOROLOGY
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    2623132
    • Patent number 2,623,132
    • Issue date Dec 23, 1952
    • G04 - HOROLOGY
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    898648
    • Patent number 898,648
    • Issue date Sep 15, 1908
    • G04 - HOROLOGY