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Drawing board assembly
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Patent number 5,956,856
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Issue date Sep 28, 1999
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Chiang-Wen Chen
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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Ruler for fixed-distance movement
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Patent number 4,790,077
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Issue date Dec 13, 1988
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Sharp Kabushiki Kaisha
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Hiroshi Tsujioka
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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Lettering template
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Patent number 4,679,328
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Issue date Jul 14, 1987
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Michael Saad
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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Drafting machine
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Patent number 4,559,715
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Issue date Dec 24, 1985
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Walter Weglin
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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Drafting machine
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Patent number 4,438,569
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Issue date Mar 27, 1984
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Gillespie; Robert J.
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Walter Weglin
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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3714714
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Patent number 3,714,714
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Issue date Feb 6, 1973
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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3386191
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Patent number 3,386,191
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Issue date Jun 4, 1968
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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3193943
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Patent number 3,193,943
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Issue date Jul 13, 1965
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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3106783
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Patent number 3,106,783
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Issue date Oct 15, 1963
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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3067517
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Patent number 3,067,517
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Issue date Dec 11, 1962
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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2901832
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Patent number 2,901,832
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Issue date Sep 1, 1959
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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2861343
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Patent number 2,861,343
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Issue date Nov 25, 1958
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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2825139
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Patent number 2,825,139
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Issue date Mar 4, 1958
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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2804691
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Patent number 2,804,691
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Issue date Sep 3, 1957
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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2701918
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Patent number 2,701,918
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Issue date Feb 15, 1955
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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2577159
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Patent number 2,577,159
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Issue date Dec 4, 1951
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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2568358
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Patent number 2,568,358
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Issue date Sep 18, 1951
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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2515954
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Patent number 2,515,954
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Issue date Jul 18, 1950
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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2225903
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Patent number 2,225,903
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Issue date Dec 24, 1940
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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1787362
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Patent number 1,787,362
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Issue date Dec 30, 1930
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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1511626
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Patent number 1,511,626
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Issue date Oct 14, 1924
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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1464973
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Patent number 1,464,973
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Issue date Aug 14, 1923
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES