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3891910
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Patent number 3,891,910
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Issue date Jun 24, 1975
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G05 - CONTROLLING REGULATING
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3816723
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Patent number 3,816,723
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Issue date Jun 11, 1974
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G05 - CONTROLLING REGULATING
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3806788
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Patent number 3,806,788
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Issue date Apr 23, 1974
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G05 - CONTROLLING REGULATING
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3783253
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Patent number 3,783,253
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Issue date Jan 1, 1974
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G05 - CONTROLLING REGULATING
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3727191
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Patent number 3,727,191
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Issue date Apr 10, 1973
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G05 - CONTROLLING REGULATING
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3705978
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Patent number 3,705,978
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Issue date Dec 12, 1972
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G05 - CONTROLLING REGULATING
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3689892
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Patent number 3,689,892
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Issue date Sep 5, 1972
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G05 - CONTROLLING REGULATING
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3666930
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Patent number 3,666,930
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Issue date May 30, 1972
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G05 - CONTROLLING REGULATING
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3651481
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Patent number 3,651,481
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Issue date Mar 21, 1972
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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3634662
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Patent number 3,634,662
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Issue date Jan 11, 1972
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G05 - CONTROLLING REGULATING
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3626385
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Patent number 3,626,385
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Issue date Dec 7, 1971
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G05 - CONTROLLING REGULATING
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3611101
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Patent number 3,611,101
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Issue date Oct 5, 1971
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G05 - CONTROLLING REGULATING
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3609497
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Patent number 3,609,497
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G05 - CONTROLLING REGULATING
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3597740
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Patent number 3,597,740
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Issue date Aug 3, 1971
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G05 - CONTROLLING REGULATING