LandOfFree - US Patents - Listing for Telecommunications

Telecommunications – Transmitter and receiver at separate stations – Plural transmitters or receivers

"Plug and play" telephone system

Telecommunications – Radiotelephone system – Usage measurement

“Calling party pays” cellular and prepaid...

Telecommunications – Radiotelephone system – Special service

1.times.N communication system for private branch exchange

Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion

2 N -order sub-harmonic frequency modulator having high...

Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion

2 N -order sub-harmonic frequency modulator having high...

Telecommunications – Receiver or analog modulated signal frequency converter – Cabinet – housing – or chassis structure

2-way radio with silent annunciation

Telecommunications – Transmitter and receiver at same station – With transmitter-receiver switching or interaction prevention

2V SPDT switch for high power RF wireless applications

Telecommunications – Radiotelephone system – Zoned or cellular telephone system

3G and Wi-Fi connected mobile systems

Telecommunications – Transmitter and receiver at same station – With frequency stabilization

3G radio

Telecommunications – Radiotelephone system – Zoned or cellular telephone system

3G/GSM and WLAN integration of telephony

Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail

4DHelp mobile device for 4DHelp information distribution system

Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail

7, 8 segment display for mobile radio telephone

Telecommunications – Transmitter – Noise or interference elimination

802.11 networks using dynamic power control for RF transmission

Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion

90° phase shifter and image rejection mixer

Telecommunications – Carrier wave repeater or relay system – Portable or mobile repeater

A cellular/satellite communications system with generation of a

Telecommunications – Transmitter and receiver at separate stations – Suppressed carrier wave system

A muiti-mode modulation and demodulation system and method

Telecommunications – Receiver or analog modulated signal frequency converter – Frequency or phase modulation

A.F.C. system for broad-band FM receiver

Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail

A/V control for a computing device with handheld and...

Telecommunications – Transmitter – With electrical protection of transmitter circuit or operator

Abnormal transmission stopping circuit for transmitter