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Place value teaching device
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Patent number 10,127,830
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Issue date Nov 13, 2018
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Tony Jay Ballew
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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Music teaching device
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Patent number 9,489,859
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Issue date Nov 8, 2016
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Federico Paulovich
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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Teaching aid
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Patent number 6,676,415
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Issue date Jan 13, 2004
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Direct Educational Services Limited
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Roger Walker
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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Toy having rotating element
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Patent number 6,648,647
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Issue date Nov 18, 2003
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LeapFrog Enterprises, Inc.
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Michael C. Wood
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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Wheel puzzle game book
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Patent number 6,095,818
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Issue date Aug 1, 2000
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William I. Brazley
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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Music teaching aid
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Patent number 6,031,172
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Issue date Feb 29, 2000
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Musacus International Limited
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Marios Gabriel Papadopoulos
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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-
-
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Educational toy
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Patent number 4,534,736
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Issue date Aug 13, 1985
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Ben Cogdill
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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Spelling machine
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Patent number 4,340,373
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Issue date Jul 20, 1982
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Arco Industries Ltd.
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Bruce M. D'Andrade
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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Educational toy
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Patent number 4,146,977
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Issue date Apr 3, 1979
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Maryhannah S. Barberi
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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Teaching device
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Patent number 4,123,852
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Issue date Nov 7, 1978
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Vera Zimowski
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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Rollers with plural detents
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Patent number 4,026,043
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Issue date May 31, 1977
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Andrew Caruso
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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3817614
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Patent number 3,817,614
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Issue date Jun 18, 1974
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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3717942
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Patent number 3,717,942
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Issue date Feb 27, 1973
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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3674905
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Patent number 3,674,905
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Issue date Jul 4, 1972
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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3574957
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Patent number 3,574,957
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Issue date Apr 13, 1971
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A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
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3462857
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Patent number 3,462,857
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Issue date Aug 26, 1969
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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2496498
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Patent number 2,496,498
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Issue date Feb 7, 1950
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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2461926
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Patent number 2,461,926
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Issue date Feb 15, 1949
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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2411717
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Patent number 2,411,717
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Issue date Nov 26, 1946
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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2049178
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Patent number 2,049,178
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Issue date Jul 28, 1936
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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1995154
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Patent number 1,995,154
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Issue date Mar 19, 1935
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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1470845
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Patent number 1,470,845
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Issue date Oct 16, 1923
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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1391986
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Patent number 1,391,986
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Issue date Sep 27, 1921
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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1386248
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Patent number 1,386,248
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Issue date Aug 2, 1921
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS