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Cryptographs
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Patent number 6,130,946
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Issue date Oct 10, 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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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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Cryptographic equipment
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Patent number 5,887,064
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Issue date Mar 23, 1999
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Siemens Aktiengesellschaft
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Martin Seysen
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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Code translator
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Patent number 4,441,095
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Issue date Apr 3, 1984
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GRETAG Aktiengesellschaft
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Walter R. Widmer
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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Data indicator unit
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Patent number 4,068,089
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Issue date Jan 10, 1978
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Gretag Aktiengesellschaft
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Werner Kuhnlein
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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Rotors
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Patent number 3,984,922
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Issue date Oct 12, 1976
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Leo Rosen
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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3683513
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Patent number 3,683,513
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Issue date Aug 15, 1972
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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3557307
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Patent number 3,557,307
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Issue date Jan 19, 1971
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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3229037
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Patent number 3,229,037
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Issue date Jan 11, 1966
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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3085163
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Patent number 3,085,163
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Issue date Apr 9, 1963
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G06 - COMPUTING CALCULATING COUNTING
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3083263
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Patent number 3,083,263
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Issue date Mar 26, 1963
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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2984700
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Patent number 2,984,700
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Issue date May 16, 1961
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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2964856
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Patent number 2,964,856
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Issue date Dec 20, 1960
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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2943309
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Patent number 2,943,309
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Issue date Jun 28, 1960
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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2941036
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Patent number 2,941,036
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Issue date Jun 14, 1960
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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2941035
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Patent number 2,941,035
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Issue date Jun 14, 1960
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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2877565
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Patent number 2,877,565
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Issue date Mar 17, 1959
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS