Apparatus or circuits at the transmitting end

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

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

IPC and CPC are identically structured here. All 5 subcodes exist in both systems.

Child Classifications

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H04L 15/06 with a restricted number of keys, e.g. separate key for each type of code element IPC+CPC Available in IPC and CPC
H04L 15/12 with keyboard co-operating with code-bars IPC+CPC Available in IPC and CPC
H04L 15/16 with keyboard co-operating with code discs IPC+CPC Available in IPC and CPC
H04L 15/18 Automatic transmitters, e.g. controlled by perforated tape IPC+CPC Available in IPC and CPC
H04L 15/22 Apparatus or circuits for sending one or a restricted number of signals, e.g. distress signals IPC+CPC Available in IPC and CPC