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1920855
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Patent number 1,920,855
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Issue date Aug 1, 1933
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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599490
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Patent number 599,490
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Issue date Feb 22, 1898
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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259716
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Patent number 259,716
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Issue date Jun 20, 1882
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES