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PCE
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DIFF Subgroup
H04L 15/03

Keys structurally combined with sound generators

Introduced: July 1974

Full Title

Full titles differ between systems:

IPC:

Apparatus or local circuits for transmitting or receiving dot-and-dash codes, e.g. Morse code > Keys structurally combined with sound generators

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) > Keys structurally combined with sound generators

No child classifications to compare. This is a leaf node in both IPC and CPC.