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)
03/1986
03/04/1986	US4574376 Activation of a transmission link by code sending
02/1986
02/04/1986	CA1200333A1 Activation of a transmission link by code sending
06/1985
06/26/1985	EP0070287B1 High frequency communications
06/06/1985	WO1985002509A1 Apparatus for correcting frequency-dependent attenuation of the transmitting medium in signal transmission
03/1985
03/20/1985	EP0134217A1 Activation of a transmission link by code sending.
12/1984
12/18/1984	CA1179744A1 Quadriphase differential demodulator
07/1984
07/19/1984	WO1984002816A1 Activation of a transmission link by code sending
02/1984
02/14/1984	US4432090 Automatic error correction system for teleprinter traffic with bunched repetition
02/1983
02/09/1983	EP0071192A1 System for baseband digital transmission in both directions on a two-wire line
01/1983
01/26/1983	EP0070287A1 High frequency communications.
12/1982
12/07/1982	US4362997 Quadriphase differential demodulator
08/1982
08/05/1982	WO1982002633A1 High frequency communications
06/1982
06/24/1982	WO1982002131A1 Method and apparatus for demodulating differentially encoded phase modulated data transmissions
12/1981
12/30/1981	EP0042650A1 Transmitting-receiving system for teleprinter traffic via communication paths according to the ARQ-system with bunched repetition
02/1981
02/04/1981	EP0023274A1 Device for transmitting additional information at an unchanged clock rate in a transmission system and method of operating said device
05/1979
05/01/1979	US4152582 Compaction/expansion logic
09/1977
09/06/1977	US4047055 Line control unit for teleprinters
07/1977
07/26/1977	US4038652 Digital communications line terminal compacter/expander

1 ... 37 38 39 40 41 42 43 44 45 46 47