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Locking setting devices during transmission to prevent interference by user

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  • CPC
  • H04M1/32
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Parent Industries

HELECTRICITY H04Electric communication H04MTELEPHONIC COMMUNICATION H04M1/00Substation equipment

Current Industry

H04M1/32Locking setting devices during transmission to prevent interference by user
Industries

Patents Grantslast 30 patents

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    Three-level power conversion circuit system
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    • Fuji Electric Co., Ltd.
    • Satoki Takizawa
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    Infrared sensors for electronic devices
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    • Apple Inc.
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    3614331
    • Patent number 3,614,331
    • Issue date Oct 19, 1971
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    3365554
    • Patent number 3,365,554
    • Issue date Jan 23, 1968
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    3149702
    • Patent number 3,149,702
    • Issue date Sep 22, 1964
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    2781666
    • Patent number 2,781,666
    • Issue date Feb 19, 1957
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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    1662141
    • Patent number 1,662,141
    • Issue date Mar 13, 1928
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    1609982
    • Patent number 1,609,982
    • Issue date Dec 7, 1926
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    1523468
    • Patent number 1,523,468
    • Issue date Jan 20, 1925
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    1522180
    • Patent number 1,522,180
    • Issue date Jan 6, 1925
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    1520910
    • Patent number 1,520,910
    • Issue date Dec 30, 1924
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    1444777
    • Patent number 1,444,777
    • Issue date Feb 13, 1923
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents