DIFF Main Group
G09C 3/00 Typewriters for ciphering or deciphering cryptographic text (marking record carriers G06K)
Introduced: September 1968
Title
Titles differ between systems:
IPC: Typewriters for ciphering or deciphering cryptographic text
CPC: Typewriters for ciphering or deciphering cryptographic text (marking record carriers G06K)
Full Title
Full titles differ between systems:
IPC:
Typewriters for ciphering or deciphering cryptographic text
CPC:
Typewriters for ciphering or deciphering cryptographic text (marking record carriers G06K)
IPC and CPC are identically structured here. All 2 subcodes exist in both systems.
Child Classifications
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- G09C 3/02 with auxiliary keys or keyboards acting on the original keys or keyboards IPC+CPC Available in IPC and CPC
- G09C 3/04 wherein the operative connections between the keys and the type-bars are automatically and continuously permuted, during operation, by a coding or key member IPC+CPC Available in IPC and CPC