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Pen structure with a flag
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Patent number 4,984,379
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Issue date Jan 15, 1991
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Victor Lee
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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Reflected sign
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Patent number 4,132,022
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Issue date Jan 2, 1979
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Charles P. Wood
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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Memo device
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Patent number 4,014,285
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Issue date Mar 29, 1977
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The Raymond Lee Organization, Inc.
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Charles W. Davis
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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3055113
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Patent number 3,055,113
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Issue date Sep 25, 1962
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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2621430
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Patent number 2,621,430
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Issue date Dec 16, 1952
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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2049675
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Patent number 2,049,675
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Issue date Aug 4, 1936
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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2029771
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Patent number 2,029,771
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Issue date Feb 4, 1936
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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1809162
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Patent number 1,809,162
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Issue date Jun 9, 1931
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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1386332
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Patent number 1,386,332
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Issue date Aug 2, 1921
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS