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Cathodochromic sodalite
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Patent number 3,931,042
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Issue date Jan 6, 1976
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U.S. Philips Corporation
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Roelof Egbert Schuil
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C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
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3911315
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Patent number 3,911,315
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Issue date Oct 7, 1975
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C01 - INORGANIC CHEMISTRY
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3816786
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Patent number 3,816,786
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Issue date Jun 11, 1974
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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3796907
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Patent number 3,796,907
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Issue date Mar 12, 1974
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H01 - BASIC ELECTRIC ELEMENTS
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3795531
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Patent number 3,795,531
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Issue date Mar 5, 1974
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G21 - NUCLEAR PHYSICS NUCLEAR ENGINEERING
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3774173
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Patent number 3,774,173
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Issue date Nov 20, 1973
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G02 - OPTICS
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3773540
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Patent number 3,773,540
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Issue date Nov 20, 1973
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C01 - INORGANIC CHEMISTRY
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3761159
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Patent number 3,761,159
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Issue date Sep 25, 1973
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G02 - OPTICS
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3744877
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Patent number 3,744,877
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Issue date Jul 10, 1973
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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3737700
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Patent number 3,737,700
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Issue date Jun 5, 1973
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H01 - BASIC ELECTRIC ELEMENTS
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3736461
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Patent number 3,736,461
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Issue date May 29, 1973
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H01 - BASIC ELECTRIC ELEMENTS
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3734597
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Patent number 3,734,597
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Issue date May 22, 1973
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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3715150
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Patent number 3,715,150
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Issue date Feb 6, 1973
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G02 - OPTICS
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3715619
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Patent number 3,715,619
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Issue date Feb 6, 1973
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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3706845
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Patent number 3,706,845
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Issue date Dec 19, 1972
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H01 - BASIC ELECTRIC ELEMENTS
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3705323
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Patent number 3,705,323
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Issue date Dec 5, 1972
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C01 - INORGANIC CHEMISTRY
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3703660
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Patent number 3,703,660
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Issue date Nov 21, 1972
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G02 - OPTICS
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3700791
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Patent number 3,700,791
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Issue date Oct 24, 1972
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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3700804
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Patent number 3,700,804
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Issue date Oct 24, 1972
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H01 - BASIC ELECTRIC ELEMENTS
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3683358
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Patent number 3,683,358
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Issue date Aug 8, 1972
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H01 - BASIC ELECTRIC ELEMENTS
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3657709
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Patent number 3,657,709
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Issue date Apr 18, 1972
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H01 - BASIC ELECTRIC ELEMENTS
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3647959
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Patent number 3,647,959
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Issue date Mar 7, 1972
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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3626388
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Patent number 3,626,388
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Issue date Dec 7, 1971
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G11 - INFORMATION STORAGE
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3600060
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Patent number 3,600,060
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Issue date Aug 17, 1971
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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3598750
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Patent number 3,598,750
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Issue date Aug 10, 1971
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C01 - INORGANIC CHEMISTRY
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3592528
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Patent number 3,592,528
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Issue date Jul 13, 1971
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY