4. Telephonic communications
  5. Substation or terminal circuitry
  6. Visual signalling

James Joseph Hartmann

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Method and apparatus for using telephone house wiring for voice/

Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...
Patent

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Method and apparatus for using telephone house wiring for...

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

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Switching apparatus for use in telephone house wiring

Telephonic communications – Polystation line system
Patent

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Switching apparatus for use in telephone house wiring

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

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Viewing angle compensation of LCD display

Telephonic communications – Substation or terminal circuitry – Visual signalling
Patent

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Profile ID: LFUS-PAI-P-191555

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