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Felt-tip pen wth refilling means
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Patent number 5,626,431
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Issue date May 6, 1997
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Esselte Meto International GmbH
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Norbert Hetzer
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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3480371
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Patent number 3,480,371
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Issue date Nov 25, 1969
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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3035542
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Patent number 3,035,542
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Issue date May 22, 1962
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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3020578
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Patent number 3,020,578
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Issue date Feb 13, 1962
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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2889810
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Patent number 2,889,810
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Issue date Jun 9, 1959
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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2737927
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Patent number 2,737,927
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Issue date Mar 13, 1956
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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2708904
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Patent number 2,708,904
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Issue date May 24, 1955
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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2629359
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Patent number 2,629,359
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Issue date Feb 24, 1953
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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2523879
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Patent number 2,523,879
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Issue date Sep 26, 1950
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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2516511
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Patent number 2,516,511
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Issue date Jul 25, 1950
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES