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Pen holding devices
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Patent number 11,320,916
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Issue date May 3, 2022
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Hewlett-Packard Development Company, L.P.
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Chan Woo Park
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G06 - COMPUTING CALCULATING COUNTING
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Ink-slab for calligraphy
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Patent number 6,155,425
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Issue date Dec 5, 2000
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Jiun Feng You
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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2779313
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Patent number 2,779,313
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Issue date Jan 29, 1957
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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2773480
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Patent number 2,773,480
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Issue date Dec 11, 1956
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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2596009
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Patent number 2,596,009
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Issue date May 6, 1952
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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2419285
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Patent number 2,419,285
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Issue date Apr 22, 1947
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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2207086
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Patent number 2,207,086
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Issue date Jul 9, 1940
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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2160661
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Patent number 2,160,661
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Issue date May 30, 1939
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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2086015
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Patent number 2,086,015
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Issue date Jul 6, 1937
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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2053517
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Patent number 2,053,517
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Issue date Sep 8, 1936
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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1975512
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Patent number 1,975,512
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Issue date Oct 2, 1934
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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1916808
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Patent number 1,916,808
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Issue date Jul 4, 1933
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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1876197
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Patent number 1,876,197
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Issue date Sep 6, 1932
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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1862988
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Patent number 1,862,988
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Issue date Jun 14, 1932
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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1833858
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Patent number 1,833,858
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Issue date Nov 24, 1931
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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1832170
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Patent number 1,832,170
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Issue date Nov 17, 1931
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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1832582
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Patent number 1,832,582
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Issue date Nov 17, 1931
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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1806630
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Patent number 1,806,630
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Issue date May 26, 1931
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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1615377
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Patent number 1,615,377
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Issue date Jan 25, 1927
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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1596920
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Patent number 1,596,920
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Issue date Aug 24, 1926
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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1589442
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Patent number 1,589,442
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Issue date Jun 22, 1926
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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1585029
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Patent number 1,585,029
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Issue date May 18, 1926
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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1571252
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Patent number 1,571,252
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Issue date Feb 2, 1926
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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1557021
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Patent number 1,557,021
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Issue date Oct 13, 1925
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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1508535
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Patent number 1,508,535
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Issue date Sep 16, 1924
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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1499009
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Patent number 1,499,009
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Issue date Jun 24, 1924
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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1417081
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Patent number 1,417,081
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Issue date May 23, 1922
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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1389650
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Patent number 1,389,650
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Issue date Sep 6, 1921
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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1386108
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Patent number 1,386,108
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Issue date Aug 2, 1921
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES