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Portable data stack holder
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Patent number 11,183,084
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Issue date Nov 23, 2021
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Wojciech StopiĆski
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Roller-shaped electronic stamp
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Patent number 11,177,968
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Issue date Nov 16, 2021
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International Business Machines Corporation
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Taihei Miyamoto
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Cryptographic system
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Patent number 6,097,812
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Issue date Aug 1, 2000
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The United States of America as represented by the National Security Agency
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William F. Friedman
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3891799
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Patent number 3,891,799
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Issue date Jun 24, 1975
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3485948
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Patent number 3,485,948
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Issue date Dec 23, 1969
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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3479456
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Patent number 3,479,456
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Issue date Nov 18, 1969
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3463873
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Patent number 3,463,873
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Issue date Aug 26, 1969
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3260804
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Patent number 3,260,804
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Issue date Jul 12, 1966
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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3210469
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Patent number 3,210,469
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Issue date Oct 5, 1965
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3210471
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Patent number 3,210,471
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Issue date Oct 5, 1965
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3159712
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Patent number 3,159,712
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Issue date Dec 1, 1964
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3093714
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Patent number 3,093,714
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Issue date Jun 11, 1963
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H04 - ELECTRIC COMMUNICATION TECHNIQUE