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PCE
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DIFF Subgroup
G09C 3/02

with auxiliary keys or keyboards acting on the original keys or keyboards

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Typewriters for ciphering or deciphering cryptographic text > with auxiliary keys or keyboards acting on the original keys or keyboards

CPC:

Typewriters for ciphering or deciphering cryptographic text (marking record carriers G06K) > with auxiliary keys or keyboards acting on the original keys or keyboards

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