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This page displays all 「FI」 in main group G09C3/00. |
HB:Handbook | ||||
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CC:Concordance | |||||
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Typewriters for ciphering or deciphering cryptographic text | HB | CC | 5J104 | |
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.with auxiliary keys or keyboards acting on the original keys or keyboards | HB | CC | 5J104 | |
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.wherein the operative connections between the keys and the type-bars are automatically and continuously permuted, during operation, by a coding or key member | HB | CC | 5J104 | |
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..the connections being mechanical | HB | CC | 5J104 | |
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..the connections being electrical | HB | CC | 5J104 | |
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..involving removable or interchangeable coding members, e.g. master tapes, punched cards | HB | CC | 5J104 | |