Patents
Sitemap › H04 - Electric communication technique › H04B - Transmission
More topics under "H04B - Transmission" (547,929)
H04B 1 - Details of transmission systems, not covered by a single one of groups; Details of transmission systems not characterised by the medium used for transmission (188,568)
H04B 10 - Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication (73,125)
H04B 11 - Transmission systems employing ultrasonic, sonic or infrasonic waves (1,545)
H04B 13 - Transmission systems characterised by the medium used for transmission, not provided for in groups (1,959)
H04B 14 - Transmission systems not characterised by the medium used for transmission (7,274)
H04B 15 - Suppression or limitation of noise or interference (10,227)
H04B 17 - Monitoring; Testing (29,423)
H04B 3 - Line transmission systems (31,523)
H04B 5 - Near-field transmission systems, e.g. inductive loop type (17,859)
H04B 7 - Radio transmission systems, i.e. using radiation field (186,426)
Patents for H04B - Transmission (2,303)
03/1993
03/24/1993EP0533395A1 A cellular radio communication system with different modulation according to cell size
03/17/1993CN1070072A Communications apparatus
01/1993
01/21/1993WO1993001659A1 Radio mode responsive to the position of a moveable antenna
12/1992
12/29/1992CA1312119C Optical shunt device
12/09/1992EP0231259B1 Nationwide radio paging system
10/1992
10/20/1992US5157653 Residual echo elimination with proportionate noise injection
10/15/1992WO1992017949A1 Process for finding the transmission properties of an electric line
10/01/1992DE4209761A1 Verfahren zum ermitteln der uebertragungseigenschaften eines elektrischen systems Method for determining the electric system of a uebertragungseigenschaften
09/1992
09/30/1992EP0300016B1 Device for the remote transmission of signals, particularly video signals
09/28/1992CA2106973A1 Process for finding the transmission properties of an electric line
09/16/1992EP0503579A2 Broad linewidth lasers for optical fiber communication systems
09/09/1992CN1064381A Remote message centers for cordless telephone communication system
07/1992
07/21/1992US5133031 Optical shunt device
07/14/1992CA1305220C Nationwide radio paging system
07/01/1992EP0465463A4 Power conservation method and apparatus for a portion of a predetermined signal
04/1992
04/14/1992CA1298899C Hybrid communications system
03/1992
03/18/1992EP0475135A1 Transmission system for connection network in communication networks
03/18/1992CN1059628A Residual echo elimination with preportionate noise injection
03/04/1992EP0204718B1 Full duplex speakerphone for radio and landline telephones
02/1992
02/18/1992US5089886 Device for the remote transmission of signals and in particular video signals
02/11/1992CA1295728C Transmission device, notably video signals
02/04/1992WO1992002994A1 Residual echo elimination with proportionate noise injection
01/1992
01/15/1992EP0465463A1 Power conservation method and apparatus for a portion of a predetermined signal.
10/1991
10/29/1991CA1291537C2 Portable communications receiver with separated information presentation means and improved battery saving function
10/02/1991CN1014199B Power conservation method and apparatus for portion of predetermined signal
09/1991
09/04/1991EP0360803A4 Portable communications receiver with separate information presentation means and improved battery saving function
07/1991
07/10/1991EP0409880A4 Actuator and communication system
07/09/1991CA1285992C Method and apparatus for automatically adjusting the output power of a transmitter
04/1991
04/24/1991CA2001308A1 Short range multi-channel microwave transmitter
04/09/1991CA1282834C Portable communications receiver with separate information presentation means and improved battery saving function
03/1991
03/19/1991CA1281778C Fm receiver with improved response to rayleigh faded companded signals
03/15/1991CA2025407A1 Cellular radio communication system for use with low-power remote stations
03/13/1991EP0211849B1 Pager system and communication protocol
02/1991
02/20/1991EP0413369A1 A portable pager
02/13/1991EP0412574A2 Antenna for watch pager system
01/1991
01/30/1991EP0409880A1 Actuator and communication system.
01/16/1991EP0408086A2 Watch pager system
11/1990
11/20/1990US4972432 Multiplexed synchronous/asynchronous data bus
10/1990
10/23/1990CA1275447C Fm communication system with improved response to rayleigh-faded received signals
08/1990
08/09/1990WO1990009065A1 Multiplexed synchronous/asynchronous data bus
07/1990
07/11/1990EP0219537B1 Method and apparatus for adjusting a digital equalizing filter in simultaneous adaptive echo elimination and adaptive elimination of noise caused by intersymbol interference
06/1990
06/14/1990WO1990006634A1 Power conservation method and apparatus for a portion of a predetermined signal
06/13/1990CN1043054A Power conservation method and apparatus for portion of predetermined signal
05/1990
05/17/1990WO1990005431A1 Method and apparatus for automatically adjusting the output power of a transmitter
04/1990
04/18/1990EP0363998A2 Portable communications receiver with improved battery saving function
04/17/1990US4918431 Method and apparatus for automatically adjusting the output power of a transmitter
04/04/1990EP0360803A1 Portable communications receiver with separate information presentation means and improved battery saving function.
01/1990
01/25/1990WO1990000838A1 Optical shunt device
10/1989
10/19/1989WO1989010030A1 Actuator and communication system
09/1989
09/26/1989CA1260636A1 Watch pager system and communication protocol
09/13/1989CN1035596A Passive universal communication
07/1989
07/11/1989CA1257352A1 Method and apparatus for adjusting a digital equalizing filter in simultaneous adaptive echo elimination and adaptice elimination of noise caused by intersymbol interference
04/1989
04/04/1989CA1252167A1 Apparatus for transmitting and receiving a power line carrier signal
03/1989
03/08/1989CN1003555B Full duplex speakerphone for radio and landline telephones
02/1989
02/07/1989US4803487 Portable communications receiver with separate information presentation means
01/1989
01/25/1989EP0300016A1 Device for the remote transmission of signals, particularly video signals.
11/1988
11/03/1988WO1988008649A1 Portable communications receiver with separate information presentation means and improved battery saving function
09/1988
09/07/1988EP0281440A1 Signal transmission apparatus, especially for video signals
08/1988
08/11/1988WO1988005979A1 Device for the remote transmission of signals, particularly video signals
08/09/1988US4763322 Digital radio transmission system with variable duration of the time slots in the time-division multiplex frame
03/1988
03/15/1988CA1234235A1 Full duplex speakerphone for radio and landline telephones
02/1988
02/23/1988US4727543 Method and apparatus for adjusting a digital equalizing filter
12/1987
12/17/1987EP0231259A4 Nationwide radio paging system.
08/1987
08/12/1987EP0231259A1 Nationwide radio paging system.
04/1987
04/29/1987EP0219537A1 Method and apparatus for adjusting a digital equalizing filter in simultaneous adaptive echo elimination and adaptive elimination of noise caused by intersymbol interference.
03/1987
03/18/1987EP0114890B1 Method and apparatus for measuring the strength of a radio frequency signal
03/04/1987EP0211849A1 Pager system and communication protocol.
02/1987
02/12/1987WO1987000994A1 Nationwide radio paging system
02/04/1987EP0210698A2 Radio transmission system with a variable time slot duration in a time division multiplex frame
12/1986
12/23/1986CA1215746A1 General purpose data control terminal
12/16/1986US4629829 Full duplex speakerphone for radio and landline telephones
11/1986
11/19/1986CN85109020A Full duplex speakerphone for radio and landline telephones
11/06/1986WO1986006567A1 Method and apparatus for adjusting a digital equalizing filter in simultaneous adaptive echo elimination and adaptive elimination of noise caused by intersymbol interference
08/1986
08/12/1986CA1209642A1 Digital voice storage system
08/05/1986CA1209210A1 Method and apparatus for measuring the strength of a radio signal frequency
07/1986
07/03/1986WO1986003912A1 Full duplex speakerphone for radio and landline telephones
06/1986
06/19/1986WO1986003645A1 Watch pager system and communication protocol
06/11/1986EP0183926A2 Method for the transmission of digital information in a radiotelephone network
06/10/1986CA1205876A1 Fir-type balance filter incorporated in the transmitter-receiver unit in a telecommunication system
02/1986
02/18/1986US4571719 FIR-Type balance filter incorporated in the transmitter-receiver unit in a telecommunication system
09/1985
09/24/1985CA1194204A1 Car radio provided with devices allowing the remote control thereof
09/03/1985US4539674 In a telecommunications system
07/1985
07/30/1985CA1191224A1 Method of providing adaptive echo cancellation in transmission of digital information in duplex, and apparatus for performing the method
04/1985
04/03/1985EP0054024B1 Subscriber line audio processing circuit apparatus
02/1985
02/18/1985EP0116064A4 General purpose data control terminal.
12/1984
12/19/1984EP0128192A1 Digital voice storage system
10/1984
10/24/1984EP0092569B1 A fir-type balance filter incorporated in the transmitter-receiver unit in a telecommunication system
10/11/1984EP0114890A4 Method and apparatus for measuring the strength of a radio frequency signal.
08/1984
08/28/1984US4468813 Digital voice storage system
08/22/1984EP0116064A1 General purpose data control terminal
08/08/1984EP0114890A1 Method and apparatus for measuring the strength of a radio frequency signal.
06/1984
06/21/1984WO1984002435A1 Digital voice storage system
04/1984
04/03/1984CA1165029A1 Subscriber line audio processing circuit apparatus
02/1984
02/16/1984WO1984000653A1 Method and apparatus for measuring the strength of a radio frequency signal
02/16/1984WO1984000651A1 General purpose data control terminal
11/1983
11/02/1983EP0092569A1 A fir-type balance filter incorporated in the transmitter-receiver unit in a telecommunication system.
05/1983
05/11/1983WO1983001716A1 Method of providing adaptive echo cancellation in transmission of digital information in duplex, and apparatus for performing the method
05/11/1983WO1983001715A1 An fir-type balance filter incorporated in the transmitter-receiver unit in a telecommunication system
02/1983
02/09/1983EP0071192A1 System for baseband digital transmission in both directions on a two-wire line
01/1982
01/19/1982US4311991 Acoustic transmission member
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