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  • CPC
  • G04C17/0033
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Parent Industries

GPHYSICS G04Horology G04CELECTROMECHANICAL CLOCKS OR WATCHES G04C17/00indicating the time optically by electric means

Current Industry

G04C17/0033with date indication
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Perpetual calendar clock
    • Patent number 7,609,589
    • Issue date Oct 27, 2009
    • Kuei-Wen Sheu
    • G04 - HOROLOGY
  • Information Patent Grant

    Perpetual calendar structure
    • Patent number 5,274,616
    • Issue date Dec 28, 1993
    • Kuei-Wen Shu
    • G04 - HOROLOGY
  • Information Patent Grant

    3834151
    • Patent number 3,834,151
    • Issue date Sep 10, 1974
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS

Patents Applicationslast 30 patents