4. Multiplex communications
  5. Communication techniques for information carried in plural...
  6. Combining or distributing information via frequency channels

David B. Upham

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Electrical add-drop multiplexing for optical communications...

Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via frequency channels
Reexamination Certificate

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Optical communications networks utilizing frequency division...

Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
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Recovery and transmission of return-to-zero formatted data...

Coded data generation or conversion – Digital code to digital code converters – To or from nrz codes
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2448830

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