TREA

through hollow arms

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Industry

  • CPC
  • G11B3/005
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Parent Industries

GPHYSICS G11Information storage G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER G11B3/00Recording by mechanical cutting, deforming or pressing

Current Industry

G11B3/005through hollow arms
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    1481406
    • Patent number 1,481,406
    • Issue date Jan 22, 1924
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    1436004
    • Patent number 1,436,004
    • Issue date Nov 21, 1922
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    1329906
    • Patent number 1,329,906
    • Issue date Feb 3, 1920
    • G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents