TREA

using mechano-optical means

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Industry

  • CPC
  • G04G9/067
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Parent Industries

GPHYSICS G04Horology G04GELECTRONIC TIME-PIECES G04G9/00Visual time or date indication means

Current Industry

G04G9/067using mechano-optical means
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    1881818
    • Patent number 1,881,818
    • Issue date Oct 11, 1932
    • G04 - HOROLOGY

Patents Applicationslast 30 patents