DIFF Subgroup
H04L 15/10 combined with perforating apparatus
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 > combined with perforating apparatus
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 > combined with perforating apparatus
No child classifications to compare. This is a leaf node in both IPC and CPC.