4. Telephonic communications
  5. Supervisory or control line signaling
  6. Substation originated

Patrick F. Walsh

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Telephone station equipment employing rewriteable display keys

Telephonic communications – Supervisory or control line signaling – Substation originated
Patent

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Telephone station equipment employing rewriteable display keys

Telephonic communications – Supervisory or control line signaling – Substation originated
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

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Profile ID: LFUS-PAI-P-1297805

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