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Spring hinge structure
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Patent number 6,256,839
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Issue date Jul 10, 2001
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Chien-Chen Wu
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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Structure of door hinge
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Patent number 5,606,774
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Issue date Mar 4, 1997
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Chien-Cheng Wu
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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2935761
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Patent number 2,935,761
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Issue date May 10, 1960
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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1543415
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Patent number 1,543,415
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Issue date Jun 23, 1925
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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1525397
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Patent number 1,525,397
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Issue date Feb 3, 1925
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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1332456
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Patent number 1,332,456
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Issue date Mar 2, 1920
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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1265597
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Patent number 1,265,597
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Issue date May 7, 1918
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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1242700
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Patent number 1,242,700
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Issue date Oct 9, 1917
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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1188201
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Patent number 1,188,201
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Issue date Jun 20, 1916
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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1138484
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Patent number 1,138,484
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Issue date May 4, 1915
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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1131661
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Patent number 1,131,661
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Issue date Mar 16, 1915
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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1131658
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Patent number 1,131,658
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Issue date Mar 16, 1915
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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995851
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Patent number 995,851
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Issue date Jun 20, 1911
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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984926
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Patent number 984,926
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Issue date Feb 21, 1911
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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966380
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Patent number 966,380
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Issue date Aug 2, 1910
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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941185
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Patent number 941,185
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Issue date Nov 23, 1909
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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919882
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Patent number 919,882
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Issue date Apr 27, 1909
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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919881
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Patent number 919,881
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Issue date Apr 27, 1909
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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918135
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Patent number 918,135
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Issue date Apr 13, 1909
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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898031
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Patent number 898,031
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Issue date Sep 8, 1908
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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842593
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Patent number 842,593
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Issue date Jan 29, 1907
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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824923
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Patent number 824,923
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Issue date Jul 3, 1906
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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822570
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Patent number 822,570
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Issue date Jun 5, 1906
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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787999
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Patent number 787,999
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Issue date Apr 25, 1905
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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779762
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Patent number 779,762
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Issue date Jan 10, 1905
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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764785
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Patent number 764,785
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Issue date Jul 12, 1904
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES