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  • H04Q1/22
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HELECTRICITY H04Electric communication H04QSELECTING H04Q1/00Details of selecting apparatus or arrangements for establishing connections among stations for the purpose of transferring information via these connections

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Patents Grantslast 30 patents

  • Information Patent Grant

    Photoacoustic measurement apparatus
    • Patent number 11,412,935
    • Issue date Aug 16, 2022
    • FUJIFILM Corporation
    • Kaku Irisawa
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Grant

    3515820
    • Patent number 3,515,820
    • Issue date Jun 2, 1970
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3500001
    • Patent number 3,500,001
    • Issue date Mar 10, 1970
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3497640
    • Patent number 3,497,640
    • Issue date Feb 24, 1970
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3443034
    • Patent number 3,443,034
    • Issue date May 6, 1969
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3351722
    • Patent number 3,351,722
    • Issue date Nov 7, 1967
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2709722
    • Patent number 2,709,722
    • Issue date May 31, 1955
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2102769
    • Patent number 2,102,769
    • Issue date Dec 21, 1937
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2017644
    • Patent number 2,017,644
    • Issue date Oct 15, 1935
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1996213
    • Patent number 1,996,213
    • Issue date Apr 2, 1935
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1907240
    • Patent number 1,907,240
    • Issue date May 2, 1933
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1795350
    • Patent number 1,795,350
    • Issue date Mar 10, 1931
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1795656
    • Patent number 1,795,656
    • Issue date Mar 10, 1931
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1691554
    • Patent number 1,691,554
    • Issue date Nov 13, 1928
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1640675
    • Patent number 1,640,675
    • Issue date Aug 30, 1927
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1580398
    • Patent number 1,580,398
    • Issue date Apr 13, 1926
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1551023
    • Patent number 1,551,023
    • Issue date Aug 25, 1925
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents