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Window and sash balance
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Patent number 4,190,930
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Issue date Mar 4, 1980
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Dwight M. Prosser
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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3135008
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Patent number 3,135,008
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Issue date Jun 2, 1964
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A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
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2896248
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Patent number 2,896,248
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Issue date Jul 28, 1959
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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2544005
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Patent number 2,544,005
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Issue date Mar 6, 1951
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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2396213
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Patent number 2,396,213
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Issue date Mar 5, 1946
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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2330391
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Patent number 2,330,391
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Issue date Sep 28, 1943
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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2288546
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Patent number 2,288,546
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Issue date Jun 30, 1942
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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2271309
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Patent number 2,271,309
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Issue date Jan 27, 1942
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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2248246
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Patent number 2,248,246
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Issue date Jul 8, 1941
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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2196948
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Patent number 2,196,948
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Issue date Apr 9, 1940
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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2169271
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Patent number 2,169,271
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Issue date Aug 15, 1939
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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2098634
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Patent number 2,098,634
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Issue date Nov 9, 1937
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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2096048
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Patent number 2,096,048
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Issue date Oct 19, 1937
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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1951059
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Patent number 1,951,059
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Issue date Mar 13, 1934
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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1886431
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Patent number 1,886,431
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Issue date Nov 8, 1932
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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1862305
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Patent number 1,862,305
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Issue date Jun 7, 1932
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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1849487
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Patent number 1,849,487
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Issue date Mar 15, 1932
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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1819315
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Patent number 1,819,315
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Issue date Aug 18, 1931
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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1794746
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Patent number 1,794,746
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Issue date Mar 3, 1931
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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1786428
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Patent number 1,786,428
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Issue date Dec 30, 1930
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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1756720
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Patent number 1,756,720
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Issue date Apr 29, 1930
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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1756719
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Patent number 1,756,719
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Issue date Apr 29, 1930
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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1756759
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Patent number 1,756,759
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Issue date Apr 29, 1930
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES