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Lock mechanism
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Patent number 4,074,549
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Issue date Feb 21, 1978
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Kwoon Kwen Metal Ware Company Limited
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Li Sze Yee
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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2825218
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Patent number 2,825,218
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Issue date Mar 4, 1958
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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2127583
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Patent number 2,127,583
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Issue date Aug 23, 1938
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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2028223
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Patent number 2,028,223
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Issue date Jan 21, 1936
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B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
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951613
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Patent number 951,613
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Issue date Mar 8, 1910
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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592527
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Patent number 592,527
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Issue date Oct 26, 1897
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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478754
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Patent number 478,754
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Issue date Jul 12, 1892
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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136877
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Patent number 136,877
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Issue date Mar 18, 1873
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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116469
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Patent number 116,469
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Issue date Jun 27, 1871
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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44869
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Patent number 44,869
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Issue date Nov 1, 1864
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES