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)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Apparatus or local circuits for transmitting or receiving dot-and-dash codes, e.g. Morse code

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)

Full Title

Full titles differ between systems:

IPC:

Apparatus or local circuits for transmitting or receiving dot-and-dash codes, e.g. Morse code

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)

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

Child Classifications

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H04L 15/03 Keys structurally combined with sound generators since 1974 IPC+CPC Available in IPC and CPC
H04L 15/04 Apparatus or circuits at the transmitting end IPC+CPC Available in IPC and CPC
H04L 15/24 Apparatus or circuits at the receiving end IPC+CPC Available in IPC and CPC