TREA

put into action by the spring of a mechanical alarm work

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  • CPC
  • G04C21/24
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Parent Industries

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

Current Industry

G04C21/24put into action by the spring of a mechanical alarm work
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Patents Grantslast 30 patents

  • Information Patent Grant

    2214232
    • Patent number 2,214,232
    • Issue date Sep 10, 1940
    • G04 - HOROLOGY
  • Information Patent Grant

    1950856
    • Patent number 1,950,856
    • Issue date Mar 13, 1934
    • G04 - HOROLOGY
  • Information Patent Grant

    1794820
    • Patent number 1,794,820
    • Issue date Mar 3, 1931
    • G04 - HOROLOGY
  • Information Patent Grant

    1772859
    • Patent number 1,772,859
    • Issue date Aug 12, 1930
    • G04 - HOROLOGY
  • Information Patent Grant

    776955
    • Patent number 776,955
    • Issue date Dec 6, 1904
    • G04 - HOROLOGY
  • Information Patent Grant

    700496
    • Patent number 700,496
    • Issue date May 20, 1902
    • G04 - HOROLOGY

Patents Applicationslast 30 patents