DIFF Subgroup
H04L 15/06 with a restricted number of keys, e.g. separate key for each type of code element
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Apparatus or local circuits for transmitting or receiving dot-and-dash codes, e.g. Morse code > Apparatus or circuits at the transmitting end > with a restricted number of keys, e.g. separate key for each type of code element
CPC:
Apparatus or local circuits for transmitting or receiving dot-and-dash codes, e.g. Morse code (teaching apparatus therefor G09B; telegraph tapping keys H01H21/86) > Apparatus or circuits at the transmitting end > with a restricted number of keys, e.g. separate key for each type of code element
IPC and CPC are identically structured here. All 2 subcodes exist in both systems.
Child Classifications
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- H04L 15/08 with a single key which transmits dots in one position and dashes in a second position IPC+CPC Available in IPC and CPC