4. Telephonic communications
  5. Telephone line or system combined with diverse electrical...
  6. To produce visual-graphic copy

Douglas Hartley

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Security system using call display

Telephonic communications – Emergency or alarm communications – Responsive to sensed nonsystem condition
Patent

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Telecommunications management and control apparatus

Telephonic communications – Telephone line or system combined with diverse electrical... – To produce visual-graphic copy
Patent

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Profile ID: LFUS-PAI-P-981017

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