FR629979A - Perfectionnements aux appareils de chiffrage et de déchiffrage, et aux dispositifs de changement de code pour ces appareils
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Perfectionnements aux appareils de chiffrage et de déchiffrage, et aux dispositifs de changement de code pour ces appareils
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G09C—CIPHERING OR DECIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHER PURPOSES INVOLVING THE NEED FOR SECRECY
G09C3/00—Typewriters for ciphering or deciphering cryptographic text
G09C3/04—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
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FR629979D1926-03-051927-03-01Perfectionnements aux appareils de chiffrage et de déchiffrage, et aux dispositifs de changement de code pour ces appareils
ExpiredFR629979A
(fr)