wherein the operative connections between the keys and the type-bars are automatically and continuously permuted, during operation, by a coding or key member

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Typewriters for ciphering or deciphering cryptographic text > wherein the operative connections between the keys and the type-bars are automatically and continuously permuted, during operation, by a coding or key member

CPC:

Typewriters for ciphering or deciphering cryptographic text (marking record carriers G06K) > 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 and CPC are identically structured here. All 3 subcodes exist in both systems.

Child Classifications

Navigate with arrow keys, Enter to open

G09C 3/06 the connections being mechanical IPC+CPC Available in IPC and CPC
G09C 3/08 the connections being electrical IPC+CPC Available in IPC and CPC
G09C 3/10 involving removable or interchangeable coding members, e.g. master tapes, punched cards IPC+CPC Available in IPC and CPC