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Reflection frame-equipped sheet
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Patent number 9,044,995
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Issue date Jun 2, 2015
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Hitachi Solutions, Ltd.
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Jun Ueda
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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Portable drawing system
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Patent number 7,901,214
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Issue date Mar 8, 2011
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Michael J. Liebowitz
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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Dry erase article
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Patent number 7,399,184
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Issue date Jul 15, 2008
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3M Innovative Properties Company
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Jonathan F. Hester
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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Foldable dry erase surface
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Patent number 6,648,051
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Issue date Nov 18, 2003
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BellSouth Intellectual Property Corporation
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Randy S. Young
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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Flexible writing surface
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Patent number 4,978,568
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Issue date Dec 18, 1990
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Hach Associates, Inc.
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Robert C. Postma
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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Electronic print board
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Patent number 4,670,794
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Issue date Jun 2, 1987
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Oki Electric Industry Co., Ltd.
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Seiji Araki
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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Electronic print board
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Patent number 4,667,254
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Issue date May 19, 1987
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Oki Electric Industry Co., Ltd.
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Seiji Araki
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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3497969
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Patent number 3,497,969
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Issue date Mar 3, 1970
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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3274707
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Patent number 3,274,707
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Issue date Sep 27, 1966
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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2346908
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Patent number 2,346,908
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Issue date Apr 18, 1944
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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1710630
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Patent number 1,710,630
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Issue date Apr 23, 1929
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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1237636
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Patent number 1,237,636
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Issue date Aug 21, 1917
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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1227205
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Patent number 1,227,205
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Issue date May 22, 1917
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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634149
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Patent number 634,149
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Issue date Oct 3, 1899
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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382705
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Patent number 382,705
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Issue date May 15, 1888
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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342762
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Patent number 342,762
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Issue date May 25, 1886
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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92533
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Patent number 92,533
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Issue date Jul 13, 1869
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES