TREA

Relay switches

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Industry

  • CPC
  • H04Q2213/02
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Parent Industries

HELECTRICITY H04Electric communication H04QSELECTING H04Q2213/00Indexing scheme relating to selecting arrangements in general and for multiplex systems

Current Industry

H04Q2213/02Relay switches
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Signaling system
    • Patent number 4,178,474
    • Issue date Dec 11, 1979
    • Bell Telephone Laboratories, Incorporated
    • Amos E. Joel
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Key generating system
    • Patent number 3,934,078
    • Issue date Jan 20, 1976
    • Bell Telephone Laboratories, Incorporated
    • Danforth K. Gannett
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents