Patents
Sitemap › H04 - Electric communication technique › H04L - Transmission of digital information, e.g. telegraphic communication › H04L 13 - Details of the apparatus or circuits covered by groups or
Patents for H04L 13 - Details of the apparatus or circuits covered by groups or (1,941)
02/1987
02/24/1987CA1218466A1 End user data stream syntax
02/10/1987US4642697 Facsimile relay device
02/03/1987CA1217564A1 Serial to parallel data conversion circuit
12/1986
12/16/1986US4630199 Message transmission, reception and processing apparatus for a teleprinting station
11/1986
11/20/1986EP0201935A2 Method and circuit for suppressing sequential "zeroes" data
11/20/1986EP0131001B1 Method for producing an aldehyde
10/1986
10/22/1986EP0198559A1 Communication system including a first-in-first-out buffer
09/1986
09/24/1986EP0195598A2 Universal protocol data receiver
09/23/1986CA1211835A1 Digital data transmission system
09/03/1986EP0193096A2 Interface device
09/02/1986CA1210815A1 Microprocessor self-turn-off arrangement for a consumer instrument
08/1986
08/20/1986CN85201156U Constant amplitude-narrow band carrier shift printing terminal
08/19/1986US4607363 Buffer device for a voice transmission network
07/1986
07/23/1986EP0188111A2 Data stream synchronisers
07/02/1986EP0185924A2 Buffer system with detection of read or write circuits' failures
05/1986
05/28/1986EP0182097A2 Serially attached video adapter
04/1986
04/30/1986EP0179229A2 Circuit arrangement for setting a device designed to work in a number of different operating modes, in particular a data transmission device
04/22/1986US4584684 Data transmission method
04/15/1986US4582942 Process for the manufacture of an aldehyde
03/1986
03/25/1986US4578797 In a communications system
01/1986
01/08/1986EP0166838A1 Method and arrangement for detecting a particular bit configuration in a serial bit stream
12/1985
12/31/1985US4562466 Digital data transmission/reception having adaptive error control
12/03/1985US4556850 Serial to parallel data conversion circuit
11/1985
11/27/1985EP0162174A1 Buffer device used in a voice transmission network
11/13/1985EP0161034A2 Buffer memory for an input line of a digital telephone exchange
10/1985
10/02/1985EP0156654A2 Control method for a half-duplex data transmission system
10/01/1985US4544923 Microprocessor self-turn-off arrangement for a consumer instrument
09/1985
09/24/1985US4543627 Internal communication arrangement for a multiprocessor system
08/1985
08/07/1985EP0150341A2 Method and arrangement for automatically protocolling transmission orders for texts to be transmitted
07/1985
07/30/1985CA1191277A1 First-in, first-out (fifo) memory configuration for queue storage
07/30/1985CA1191276A1 Multiplexed first-in, first-out queues
07/30/1985CA1191267A1 Microprocessor operated telecommunications interface for a terminal of an automatic teletypewriter switching service
06/1985
06/25/1985US4525849 Data transmission facility between two asynchronously controlled data processing systems with a buffer memory
05/1985
05/21/1985US4518823 Modem cartridge and connection for program cartridge type computers
05/14/1985US4517553 N-Key rollover keyboard
05/07/1985US4516247 Signal receiver which indicates the status of the device connected thereto
04/1985
04/24/1985EP0137928A2 Data exchange flow control method and apparatus
04/03/1985EP0135906A2 Terminal for data transmission system
03/1985
03/26/1985US4507760 First-in, first-out (FIFO) memory configuration for queue storage
03/13/1985EP0134115A2 Asynchronous buffered communications interface
03/05/1985CA1183619A1 Digital transmitting system
02/1985
02/26/1985US4501930 Teleprinter
02/26/1985CA1183273A1 Interface mechanism between a pair of processors, such as host and peripheral-controlling processors in data processing systems
02/13/1985EP0132481A1 Shift register arrangement and data transmission system comprising such an arrangement
02/12/1985US4499576 Multiplexed first-in, first-out queues
01/1985
01/16/1985EP0131001A1 Method for producing an aldehyde.
01/08/1985CA1180820A1 Interface processor unit
01/02/1985CA1180410A Synchronous bus arbiter
11/1984
11/27/1984CA1178687A1 Dynamic send queue modification system
10/1984
10/25/1984WO1984004220A1 Enhanced distance data transmission system
10/24/1984EP0122870A2 Enhanced distance data transmission system
10/16/1984US4477695 Microprocessor operated telecommunications interface for a terminal of an automatic teletypewriter switching service
10/10/1984EP0120934A1 Microprocessor operated telecommunications interface for a terminal of an automatic teletypewriter switching service
09/1984
09/19/1984EP0118446A1 First-in, first-out (fifo) memory configuration for queue storage.
09/18/1984US4472803 Digital transmitting system
07/1984
07/05/1984WO1984002522A1 Method for producing an aldehyde
05/1984
05/16/1984EP0108702A2 Serial to parallel data conversion circuit
05/15/1984US4449182 Interface between a pair of processors, such as host and peripheral-controlling processors in data processing systems
04/1984
04/12/1984WO1984001480A1 Microprocessor operated telecommunications interface for a terminal of an automatic teletypewriter switching service
04/03/1984US4441163 Data communication system
03/1984
03/21/1984EP0103380A1 Improvements relating to data transmission
03/01/1984WO1984000836A1 Multiplexed first-in, first-out queues
03/01/1984WO1984000835A1 First-in, first-out (fifo) memory configuration for queue storage
02/1984
02/08/1984EP0099956A1 Signal receiver and its utilization in a receiving circuit indicating the condition of the connected equipment
10/1983
10/19/1983EP0091657A1 Data transmission apparatus between two asynchronously controlled data processing systems with a buffer memory
10/19/1983EP0091644A2 Teleprinter
07/1983
07/19/1983CA1150366A1 High capacity elastic store having continuously variable delay
06/1983
06/28/1983US4390866 Keyboard with electronic hysteresis
06/23/1983WO1983002180A1 Interface processor unit
06/07/1983CA1147865A1 Message interchange system among microprocessors connected by a synchronous transmitting means
04/1983
04/20/1983EP0077008A2 Interface apparatus in a data processing system
04/14/1983WO1983001326A1 Interface mechanism between host processor and peripheral-controlling processor
04/13/1983EP0076505A1 Digital transmitting system
12/1982
12/29/1982EP0067957A1 Method for dynamically altering a send queue of documents in a data communication system
12/28/1982US4366478 Signal transmitting and receiving apparatus
10/1982
10/19/1982US4355403 Teletypewriter line keyer with switching current regulator
08/1982
08/17/1982US4345325 Message-interchange circuitry for microprocessors linked by synchronous communication network
05/1982
05/18/1982US4329921 Damping device for an electromagnetically driven printing hammer
05/04/1982US4328543 Control architecture for a communications controller
04/1982
04/27/1982US4327411 High capacity elastic store having continuously variable delay
03/1982
03/09/1982US4319077 Circuit for coded symbol conversion
02/1982
02/24/1982EP0046231A1 Process for eliminating the phase error during the reproduction of self-clocking signals, e.g. for a digital audio disc
02/02/1982US4313685 Push-button switch, particularly for keyboards of typewriters and similar devices
10/1981
10/27/1981CA1111391A1 Assembly for processing punched paper tape
09/1981
09/15/1981CA1109137A1 Acoustic encoding apparatus
09/08/1981US4288168 Arrangement for driving a printer carriage in teletypewriters or data printers
08/1981
08/25/1981CA1107840A1 Bounce dampening system for switch actuators
06/1981
06/02/1981US4271480 Apparatus enabling the transfer of data blocks of variable lengths between two memory interfaces of different widths
05/1981
05/27/1981EP0029209A1 Circuitry for storing information in data transmission technique subscriber posts
05/05/1981US4266280 Method for storing serial data on a recording carrier
04/1981
04/28/1981US4264225 Bounce dampening system for switch actuators
04/15/1981EP0026840A2 Circuit arrangement for converting characters to be fed by a keyboard into code characters, especially teleprinter characters
04/01/1981EP0025899A2 Circuit arrangement for data transmission
03/1981
03/11/1981EP0024619A1 Damping device for the electromagnetic print hammer drive in a print-hammer arrangement
02/1981
02/24/1981US4252994 Automatic teletypewriter
12/1980
12/30/1980CA1092539A1 Guiding arrangements for paper sheets
12/23/1980US4241333 Key-operated arrangement for producing code characters
12/16/1980US4239933 Circuit arrangement for releasing a keyboard store in teleprinters or data printers
11/1980
11/12/1980EP0018369A1 Series-parallel converter
11/04/1980CA1088901A1 Method of manufacturing keyboard buttons
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