4. Multiplex communications
  5. Duplex
  6. Transmit/receive interaction control

John B. Berryhill

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Automatic echo cancellation for an integrated services digital n

Multiplex communications – Duplex – Transmit/receive interaction control
Patent

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Magnetic devices and sample chambers for examination and manipul

Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Transparent
Patent

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System and associated method for the synchronization and control

Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via time channels
Patent

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