LandOfFree - US Patents - Listing for Telephonic communications

Telephonic communications – Telephone line or system combined with diverse electrical... – Remote indication over telephone line

Dial inbound meter interface unit which derives power from telep

Telephonic communications – Telephone line or system combined with diverse electrical... – Remote indication over telephone line

Dial inbound meter interface unit which uses two elements for co

Telephonic communications – Supervisory or control line signaling – Substation originated

Dial information storing and redialing method for use in a telep

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Including fault responsive disconnection of tested component

Dial line monitor and control unit

Telephonic communications – Supervisory or control line signaling – Substation originated

Dial number generator

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

Dial on demand communication

Telephonic communications – Centralized switching system – Call distribution to operator

Dial on-hold

Telephonic communications – Plural exchange network or interconnection – With interexchange network routing

Dial plan generator

Telephonic communications – Special services – Locating using diverse technology

Dial plan mapper

Telephonic communications – Special services

Dial plan mapper

Telephonic communications – Special services – Locating using diverse technology

Dial plan mapper

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection

Dial pulse detector and detecting method for paging service for

Telephonic communications – Supervisory or control line signaling – Signal receiver

Dial pulse digit detector

Telephonic communications – Special services – Anonymous party

Dial pulse selection

Telephonic communications – Plural exchange network or interconnection – Connection call model

Dial restoral method for digital circuits

Telephonic communications – Supervisory or control line signaling – Substation originated

Dial signal generator for generating dial pulse signal and dual

Telephonic communications – Substation or terminal circuitry – Conversion of signal form

Dial tone annunciating system and method

Telephonic communications – Supervisory or control line signaling – Signal reception at substation

Dial tone detector

Telephonic communications – Supervisory or control line signaling – Signal reception at substation

Dial tone detector