LandOfFree - US Patents - Listing for Telephonic communications

Telephonic communications – Centralized switching system – Structure of equipment

Unitary telephony frame arm extender

Telephonic communications – Emergency or alarm communications – Central station with plural substations

United home security system

Telephonic communications – Substation or terminal circuitry – Amplifying

Universal amplified telephone handset

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

Universal apparatus and method for interfacing signals with...

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

Universal authentication device for use over telephone lines

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

Universal authentication device for use over telephone lines

Telephonic communications – Terminal accessory or auxiliary equipment – Attachable to terminal housing

Universal bed-rail clip

Telephonic communications – With check operated control – Other than coin

Universal call access with reverse billing

Telephonic communications – Reception of calling information at substation in wireline... – Adaptive module coupled to telephone line or telephone device

Universal call-log system and method for a home network...

Telephonic communications – Reception of calling information at substation in wireline... – Adaptive module coupled to telephone line or telephone device

Universal call-log system and method for a home network...

Telephonic communications – Reception of calling information at substation in wireline... – Blocking caller id transmission

Universal calling/originating number identification

Telephonic communications – Subscriber line or transmission line interface – Hybrid circuit

Universal channel unit switchable between two wire and four wire

Telephonic communications – Special services – Conferencing

Universal conference control manager

Telephonic communications – Terminal accessory or auxiliary equipment – Telephone receiver support

Universal connection for cellular telephone interface

Telephonic communications – Having light wave or ultrasonic link for speech or paging... – Including fiber optic link within telephone network

Universal connection for cellular telephone interface

Telephonic communications – Special services – Anonymous party

Universal data structure for use with a concurrent state machine

Telephonic communications – Plural exchange network or interconnection – Interexchange signalling

Universal DC signalling detector

Telephonic communications – Emergency or alarm communications

Universal emergency number ELIN based on network address ranges

Telephonic communications – With usage measurement

Universal exchange for making least-cost non-local telephone...