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Class Information
Number: 455/462
Name: Telecommunications > Radiotelephone system > Including private cordless extension system
Description: Subject matter wherein a base transceiver having direct connection to a landline telephone switching system provides restricted telephony access to a pre-selected cordless extension unit.










Sub-classes under this class:

Class Number Class Name Patents
455/464 Channel selection or allocation 683
455/463 Multi-users 269


Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13

Patent Number Title Of Patent Date Issued
4796291 Mobile radio communications system Jan. 3, 1989
4794636 Method and apparatus for code matching the base and mobile unit of a cordless telephone set Dec. 27, 1988
4788712 Howler indicator in cordless telephone system Nov. 29, 1988
4775996 Hybrid telephony communication system Oct. 4, 1988
4754473 Remote telephonic data transcribing system Jun. 28, 1988
4752949 Corded/cordless telephone Jun. 21, 1988
4747123 MF signal transmitting control apparatus/method for use in cordless telephone system May. 24, 1988
4736404 Security arrangement for cordless telephone system Apr. 5, 1988
4731813 Address encoding system for portable battery-operated devices Mar. 15, 1988
4731814 Computer-controlled cordless telephone Mar. 15, 1988
4726052 Radio telephone system and method for controlling same Feb. 16, 1988
4706274 Cordless telephone system Nov. 10, 1987
4691338 Line switching circuit for cordless telephone Sep. 1, 1987
4689812 Cordless telephone Aug. 25, 1987
4682350 Equipment for wireless telephone transmission Jul. 21, 1987
4669109 Telephone apparatus with a fixed telephone station coupled to a mobile and detachable handset May. 26, 1987
4661659 Wireless phone system communicatively combined with a computer Apr. 28, 1987
4661970 Cordless telephone system Apr. 28, 1987
4656653 Cordless telephone apparatus having means for synchronizing channel scanning of fixed and portable units Apr. 7, 1987
4654481 Security system for cordless extension telephones Mar. 31, 1987
4650931 Cordless telephone Mar. 17, 1987
4640987 Cordless telephone Feb. 3, 1987
4639549 Cordless telephone Jan. 27, 1987
4639550 Cordless telephone Jan. 27, 1987
4634810 Station for the accommodation of a chargeable cordless telephone Jan. 6, 1987
4617424 System for preventing stealing of line in radiotelephony Oct. 14, 1986
4593155 Portable telephone ID code transfer system Jun. 3, 1986
4591661 Portable cordless telephone transceiver-radio receiver May. 27, 1986
4585903 Cordless telephone Apr. 29, 1986
D283420 Cordless telephone assembly including a transmitter/receiver base unit, a transceiver handset and cradle stand therefor Apr. 15, 1986
4538028 Apparatus for use with key telephone system with wireless telephone device Aug. 27, 1985
4535200 Cordless telephone system with security coding Aug. 13, 1985
4511761 Automatic communication standby device in cordless telephone Apr. 16, 1985
4508935 Cordless telephone having a remote control function Apr. 2, 1985
4500752 Telecontrol system for an audio recorder of a radio telephone Feb. 19, 1985
4471166 Wireless telephone extension unit with high level dial pulse signalling Sep. 11, 1984
4471167 Wireless extension telephone Sep. 11, 1984
4471168 Wireless telephone extension unit with combination filter/oscillator unit Sep. 11, 1984
4469918 Wireless telephone system with high level dial pulse signalling Sep. 4, 1984
4468538 Wireless telephone system with high level dial pulse signalling Aug. 28, 1984
4468539 Wireless telephone system with intercom signalling and auxiliary station Aug. 28, 1984
4468540 Wireless telephone system with combination filter/oscillator circuit Aug. 28, 1984
4467141 Telecommunication system with radio line Aug. 21, 1984
4467140 Microprocessor-based cordless telephone system Aug. 21, 1984
4436957 Telephone security system for cordless telephony Mar. 13, 1984
4332981 Cordless telephone Jun. 1, 1982
4291197 Remote telephone system Sep. 22, 1981
4272650 Power supply system Jun. 9, 1981
4246443 Telephone interface controller for unattended operation Jan. 20, 1981
4213009 System of connecting a wire telecommunication and a radio communication Jul. 15, 1980

1 2 3 4 5 6 7 8 9 10 11 12 13










 
 
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