4. Telephonic communications
  5. Centralized switching system
  6. Switching controlled in response to called station...

Joel A. Johnson

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Polyaryleneetherketone phosphine oxide compositions...

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate

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Systems configured to distribute a telephone call,...

Telephonic communications – Centralized switching system – Switching controlled in response to called station...
Reexamination Certificate

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