TREA

Periodical acoustic signalling arrangements

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  • CPC
  • G04B21/005
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Parent Industries

GPHYSICS G04Horology G04BMECHANICALLY-DRIVEN CLOCKS OR WATCHES MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS G04B21/00Indicating the time by acoustic means

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G04B21/005Periodical acoustic signalling arrangements
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Patents Grantslast 30 patents

  • Information Patent Grant

    Device to permit reproducing or player pianos to serve as musical c...
    • Patent number 4,444,514
    • Issue date Apr 24, 1984
    • LYF Electronics Inc.
    • F. Cecil Grace
    • G04 - HOROLOGY
  • Information Patent Grant

    3908352
    • Patent number 3,908,352
    • Issue date Sep 30, 1975
    • G04 - HOROLOGY
  • Information Patent Grant

    3662538
    • Patent number 3,662,538
    • Issue date May 16, 1972
    • G04 - HOROLOGY
  • Information Patent Grant

    3522701
    • Patent number 3,522,701
    • Issue date Aug 4, 1970
    • G04 - HOROLOGY
  • Information Patent Grant

    3508350
    • Patent number 3,508,350
    • Issue date Apr 28, 1970
    • G04 - HOROLOGY
  • Information Patent Grant

    2590027
    • Patent number 2,590,027
    • Issue date Mar 18, 1952
    • G04 - HOROLOGY
  • Information Patent Grant

    1261382
    • Patent number 1,261,382
    • Issue date Apr 2, 1918
    • G04 - HOROLOGY
  • Information Patent Grant

    1060379
    • Patent number 1,060,379
    • Issue date Apr 29, 1913
    • G04 - HOROLOGY
  • Information Patent Grant

    1054580
    • Patent number 1,054,580
    • Issue date Feb 25, 1913
    • G04 - HOROLOGY
  • Information Patent Grant

    916953
    • Patent number 916,953
    • Issue date Mar 30, 1909
    • G04 - HOROLOGY
  • Information Patent Grant

    900824
    • Patent number 900,824
    • Issue date Oct 13, 1908
    • G04 - HOROLOGY
  • Information Patent Grant

    859690
    • Patent number 859,690
    • Issue date Jul 9, 1907
    • G04 - HOROLOGY
  • Information Patent Grant

    637366
    • Patent number 637,366
    • Issue date Nov 21, 1899
    • G04 - HOROLOGY
  • Information Patent Grant

    618336
    • Patent number 618,336
    • Issue date Jan 24, 1899
    • G04 - HOROLOGY
  • Information Patent Grant

    596293
    • Patent number 596,293
    • Issue date Dec 28, 1897
    • G04 - HOROLOGY
  • Information Patent Grant

    576180
    • Patent number 576,180
    • Issue date Feb 2, 1897
    • G04 - HOROLOGY
  • Information Patent Grant

    443003
    • Patent number 443,003
    • Issue date Dec 16, 1890
    • G04 - HOROLOGY
  • Information Patent Grant

    429419
    • Patent number 429,419
    • Issue date Jun 3, 1890
    • G04 - HOROLOGY
  • Information Patent Grant

    428244
    • Patent number 428,244
    • Issue date May 20, 1890
    • G04 - HOROLOGY
  • Information Patent Grant

    371450
    • Patent number 371,450
    • Issue date Oct 11, 1887
    • G04 - HOROLOGY
  • Information Patent Grant

    371422
    • Patent number 371,422
    • Issue date Oct 11, 1887
    • G04 - HOROLOGY
  • Information Patent Grant

    347134
    • Patent number 347,134
    • Issue date Aug 10, 1886
    • G04 - HOROLOGY
  • Information Patent Grant

    346236
    • Patent number 346,236
    • Issue date Jul 27, 1886
    • G04 - HOROLOGY
  • Information Patent Grant

    280043
    • Patent number 280,043
    • Issue date Jun 26, 1883
    • G04 - HOROLOGY
  • Information Patent Grant

    249482
    • Patent number 249,482
    • Issue date Nov 15, 1881
    • G04 - HOROLOGY
  • Information Patent Grant

    240013
    • Patent number 240,013
    • Issue date Apr 12, 1881
    • G04 - HOROLOGY
  • Information Patent Grant

    232165
    • Patent number 232,165
    • Issue date Sep 14, 1880
    • G04 - HOROLOGY
  • Information Patent Grant

    231849
    • Patent number 231,849
    • Issue date Aug 31, 1880
    • G04 - HOROLOGY
  • Information Patent Grant

    223091
    • Patent number 223,091
    • Issue date Dec 30, 1879
    • G04 - HOROLOGY
  • Information Patent Grant

    213999
    • Patent number 213,999
    • Issue date Apr 8, 1879
    • G04 - HOROLOGY