Patents
Sitemap › H04 - Electric communication technique › H04L - Transmission of digital information, e.g. telegraphic communication
More topics under "H04L - Transmission of digital information, e.g. telegraphic communication" (1,208,511)
H04L 1 - Arrangements for detecting or preventing errors in the information received (103,402)
H04L 12 - Data switching networks (448,999)
H04L 13 - Details of the apparatus or circuits covered by groups or (1,941)
H04L 15 - Apparatus or local circuits for transmitting or receiving dot-and-dash codes, e.g. morse code (160)
H04L 17 - Apparatus or local circuits for transmitting or receiving codes wherein each character is represented by the same number of equal-length code elements, e.g. baudot code (677)
H04L 19 - Apparatus or local circuits for step-by-step systems (9)
H04L 21 - Apparatus or local circuits for mosaic printer telegraph systems (101)
H04L 23 - Apparatus or local circuits for systems other than those covered by groups (1,371)
H04L 25 - Baseband systems (55,083)
H04L 27 - Modulated-carrier systems (89,721)
H04L 29 - Arrangements, apparatus, circuits or systems, not covered by a single one of groups (330,333)
H04L 5 - Arrangements affording multiple use of the transmission path (28,368)
H04L 7 - Arrangements for synchronising receiver with transmitter (36,432)
H04L 9 - Arrangements for secret or secure communication (111,914)
Patents for H04L - Transmission of digital information, e.g. telegraphic communication (4,618)
12/1997
12/03/1997EP0809903A1 Electronic transfer system and method
10/1997
10/15/1997EP0537297B1 A method and a device for destination and source addressing in a packet network
08/1997
08/21/1997WO1997030538A2 Client/server communication system
08/13/1997EP0621998B1 Method and apparatus for the formatting of data for transmission
08/12/1997US5656646 Mixtures of polymers of monoethylenically unsaturated dicarboxylic acids and polymers of ethylenically unsaturated monocarboxylic acids and/or polyaminocarboxylic acids and their use
06/1997
06/19/1997WO1997022191A1 Electronic transfer system and method
06/19/1997DE19652294A1 Elektronisches Übertragungssystem und Verfahren Electronic transmission system and method
06/10/1997US5638412 Method for providing service and rate negotiation in a mobile communication system
05/1997
05/14/1997EP0669067B1 Establishing telecommunications call paths in broadband communication networks
02/1997
02/05/1997CN1142296A Data storage device
12/1996
12/19/1996WO1996034472A3 System and method for monitoring international tax status
12/18/1996EP0748549A1 A data storage device
10/1996
10/31/1996WO1996034472A2 System and method for monitoring international tax status
09/1996
09/11/1996CN1130832A Soft decision digital communication method and apparatus
09/04/1996EP0730356A2 Communication system and method for transmitting data of different types
08/1996
08/21/1996CN1129507A Method of providing service and negotiation in a mobile communication mobi
07/1996
07/03/1996EP0719491A1 Method of providing service and data rate negotiation in a mobile communication system
06/1996
06/26/1996EP0717897A1 System and method for quantum cryptography
05/1996
05/02/1996DE19540652A1 Digitales Kommunikationsverfahren aufgrund weicher Entscheidungen und Apparat A digital communication method due to soft decisions and apparatus
02/1996
02/28/1996CN1117620A 一种分布式计算机系统 A distributed computer system
12/1995
12/21/1995WO1995035002A1 Method of providing service and data rate negotiation in a mobile communication system
11/1995
11/02/1995EP0680185A2 A distributed computer system
09/1995
09/19/1995US5452304 Method and a device for destination and source addressing in a packet network
09/06/1995EP0669958A1 Mixtures of polymers of monoethylenically unsaturated dicarboxylic acids and polymers of ethylenically unsaturated monocarboxylic acids and/or polyaminocarboxylic acids, and the use of such mixtures
08/1995
08/31/1995WO1995023469A1 A data storage device
08/30/1995EP0669067A1 Establishing telecommunications call paths in broadband communication networks.
05/1995
05/16/1995US5416797 System and method for generating signal waveforms in a CDMA cellular telephone system
03/1995
03/16/1995WO1995007584A1 System and method for quantum cryptography
01/1995
01/18/1995EP0621998A4 Method and apparatus for the formatting of data for transmission.
11/1994
11/02/1994EP0621998A1 Method and apparatus for the formatting of data for transmission.
08/1994
08/23/1994CA1331645C Apparatus and method for a secure and diagnosable antijabber communication circuit
08/04/1994WO1994012571A3 Mixtures of unsaturated carboxylic acid polymerizates and use
08/03/1994CN1090302A Mixtures of polymers of monoethylenically unsaturated dicarboxylic acids and polymers of ethylenically unsaturated monocarboxylic acids and/or polyaminocarboxylic acids and their use
07/1994
07/12/1994US5329552 Method of binary encoding the points of a constellation used in a multicarrier modulation of OFDM type
06/1994
06/09/1994WO1994012571A2 Mixtures of unsaturated carboxylic acid polymerizates and use
06/09/1994CA2149746A1 Mixtures of unsaturated carboxylic acid polymerizates and use
05/1994
05/26/1994WO1994011975A1 Establishing telecommunications call paths in broadband communication networks
05/26/1994DE4239076A1 Mischungen aus Polymerisaten von monoethylenisch ungesättigten Dicarbonsäuren und Polymerisaten ethylenisch ungesättigter Monocarbonsäuren und/oder Polyaminocarbonsäuren und ihre Verwendung Mixtures of polymers of monoethylenically unsaturated dicarboxylic acids and polymers of ethylenically unsaturated monocarboxylic acids and / or polyaminocarboxylic acids and their use
05/03/1994US5309474 Communication system
04/1994
04/27/1994EP0386148B1 Apparatus and method for identification of message initiation in a process control network
01/1994
01/19/1994CN1081040A "method and apparatus for the formatting of data for transmission"
12/1993
12/01/1993EP0536334A4 System and method for generating signal waveforms in a cdma cellular telephone system
07/1993
07/22/1993WO1993014588A1 Method and apparatus for the formatting of data for transmission
07/21/1993EP0388441B1 Apparatus and method for a secure and diagnosable antijabber communication
04/1993
04/21/1993EP0537297A1 A method and a device for destination and source addressing in a packet network.
04/14/1993EP0536334A1 System and method for generating signal waveforms in a cdma cellular telephone system
01/1993
01/27/1993EP0524306A1 Method for the binary coding of points of a constellation used in a multicarrier modulation of the ofdm type
01/12/1993CA1312676C Apparatus and method for identification of message initiation in a process control network
08/1992
08/13/1992WO1992014316A1 Method for the binary coding of points of a constellation used in a multicarrier modulation of the ofdm type
08/13/1992CA2079999A1 Method for the binary coding of points of a constellation used in a multicarrier modulation of the ofdm type
07/1992
07/29/1992EP0334868B1 Digital signal coding
07/22/1992EP0211951B1 Synchronization recovery in a communications system
07/01/1992CN1017296B Ensemble modem structure for imperfect transmission media
05/1992
05/20/1992CN1061312A System and method for generating signal waveforms in cdma cellular telephone system
05/06/1992CN1016556B Ensemble modem structure for imperfect transmission media
04/1992
04/07/1992US5103459 System and method for generating signal waveforms in a cdma cellular telephone system
03/1992
03/20/1992WO1992005648A1 A method and a device for destination and source addressing in a packet network
03/20/1992CA2090034A1 Method and a device for destination and source addressing in a packet network
01/1992
01/09/1992WO1992000639A1 System and method for generating signal waveforms in a cdma cellular telephone system
10/1991
10/28/1991WO1999055036A2 Methods and apparatuses for allocating time slots to circuit-switched channels
10/09/1991EP0224556B1 Ensemble modem structure for imperfect transmission media
10/01/1991US5054036 Digital signal coding
09/1991
09/03/1991CA1288520C Synchronization recovery in a communications system
01/1991
01/30/1991CN1011461B Ensemble modem structure for imperfect transmission media
01/23/1991CN1048776A Ensemble modem structure for imperfect transmission media
01/23/1991CN1048775A Ensemble modem structure for imperfect transmission media
01/23/1991CN1048774A Ensemble modem structure for imperfect transmission media
09/1990
09/26/1990EP0388441A1 Apparatus and Method for a secure and diagnosable Antijabber Communication.
07/1990
07/04/1990EP0210213B1 Radio pager with error detection
03/1990
03/28/1990CN1007398B Synchronization recovery in communications system
10/1989
10/04/1989EP0334868A1 Digital signal coding.
10/03/1989US4872186 Apparatus and method for identification of message initiation in a process control network
09/1989
09/13/1989CN1035596A Passive universal communication
08/1989
08/22/1989US4860280 Apparatus and method for a secure and diagnosable antijabber communication circuit
07/1989
07/27/1989WO1989005076A3 Apparatus and method for a secure and diagnosable antijabber communication circuit
06/1989
06/01/1989WO1989005076A2 Apparatus and method for a secure and diagnosable antijabber communication circuit
06/01/1989WO1989005072A1 Apparatus and method for identification of message initiation in a process control network
04/1989
04/04/1989CA1252167A1 Apparatus for transmitting and receiving a power line carrier signal
03/1989
03/21/1989CA1251586A1 Ensemble modem structure for imperfect transmission media
03/14/1989US4813037 Switching system
11/1988
11/17/1988EP0290459A1 Switching system
06/1988
06/16/1988WO1988004500A1 Digital signal coding
04/1988
04/27/1988EP0163685B1 Apparatus for correcting frequency-dependent attenuation of the transmitting medium in signal transmission
03/1988
03/15/1988US4731816 Ensemble modem structure for imperfect transmission media
09/1987
09/29/1987US4697277 Synchronization recovery in a communications system
08/1987
08/25/1987CA1226039A1 Method and apparatus for communicating variable length messages between a primary station and remote stations of a data communications system
08/12/1987EP0231967A1 Switching system
07/1987
07/30/1987WO1987004579A1 Switching system
07/07/1987US4679227 Ensemble modem structure for imperfect transmission media
02/1987
02/04/1987EP0210213A1 Radio pager with error detection.
01/1987
01/27/1987US4639935 Apparatus for correcting frequency-dependent attenuation of the transmitting medium in signal transmission
12/1986
12/04/1986WO1986007223A1 Ensemble modem structure for imperfect transmission media
12/03/1986EP0134217B1 Activation of a transmission link by code sending
12/03/1986CN86100887A Synchronization recovery in a communications system
11/1986
11/26/1986CN86103406A Ensemble modem structure for imperfect transmission media
09/1986
09/23/1986CA1211799A1 Apparatus for correcting frequency-dependent attenuation of the transmitting medium in signal transmission
08/1986
08/28/1986WO1986005052A1 Synchronization recovery in a communications system
08/12/1986US4606047 High frequency communications
07/1986
07/31/1986WO1986004476A1 Radio pager with error detection
06/1986
06/11/1986EP0183926A2 Method for the transmission of digital information in a radiotelephone network
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