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Cord guide system for sash balance
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Patent number 4,800,680
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Issue date Jan 31, 1989
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Caldwell Manufacturing Company
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Norman R. Westfall
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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Friction controlled window balance
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Patent number 4,697,304
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Issue date Oct 6, 1987
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The Celotex Corporation
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Bruce L. Overgard
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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2571592
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Patent number 2,571,592
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Issue date Oct 16, 1951
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A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
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2315970
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Patent number 2,315,970
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Issue date Apr 6, 1943
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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2015404
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Patent number 2,015,404
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Issue date Sep 24, 1935
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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1891265
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Patent number 1,891,265
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Issue date Dec 20, 1932
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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1800919
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Patent number 1,800,919
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Issue date Apr 14, 1931
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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1603463
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Patent number 1,603,463
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Issue date Oct 19, 1926
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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1475627
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Patent number 1,475,627
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Issue date Nov 27, 1923
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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988972
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Patent number 988,972
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Issue date Apr 11, 1911
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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686513
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Patent number 686,513
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Issue date Nov 12, 1901
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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205514
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Patent number 205,514
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Issue date Jul 2, 1878
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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132971
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Patent number 132,971
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Issue date Nov 12, 1872
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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98752
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Patent number 98,752
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Issue date Jan 11, 1870
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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98365
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Patent number 98,365
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Issue date Dec 28, 1869
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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92453
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Patent number 92,453
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Issue date Jul 13, 1869
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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89553
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Patent number 89,553
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Issue date May 4, 1869
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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83685
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Patent number 83,685
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Issue date Nov 3, 1868
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES