4. Telephonic communications
  5. Substation or terminal circuitry
  6. Hold circuit

Keith R. Crawford

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Device for adding intercom functions to a phone system

Telephonic communications – Substation or terminal circuitry – Hold circuit
Patent

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Interchangeable robot end-of-arm tooling system

Metal working – Method of mechanical manufacture – With testing or indicating
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Profile ID: LFUS-PAI-P-1571115

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