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Foldable ladder
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Patent number 5,944,141
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Issue date Aug 31, 1999
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Gerald R. Kendall and Edward J. Green
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Brian Kochan
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Collapsible ladder
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Patent number 4,884,659
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Issue date Dec 5, 1989
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Patrick Chao
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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2461429
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Patent number 2,461,429
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Issue date Feb 8, 1949
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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1427642
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Patent number 1,427,642
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Issue date Aug 29, 1922
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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1418505
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Patent number 1,418,505
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Issue date Jun 6, 1922
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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991401
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Patent number 991,401
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Issue date May 2, 1911
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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989389
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Patent number 989,389
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Issue date Apr 11, 1911
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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799163
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Patent number 799,163
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Issue date Sep 12, 1905
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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774470
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Patent number 774,470
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Issue date Nov 8, 1904
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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736104
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Patent number 736,104
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Issue date Aug 11, 1903
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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726682
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Patent number 726,682
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Issue date Apr 28, 1903
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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609281
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Patent number 609,281
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Issue date Aug 16, 1898
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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598615
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Patent number 598,615
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Issue date Feb 8, 1898
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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585064
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Patent number 585,064
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Issue date Jun 22, 1897
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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543750
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Patent number 543,750
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Issue date Jul 30, 1895
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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523011
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Patent number 523,011
-
Issue date Jul 17, 1894
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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519499
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Patent number 519,499
-
Issue date May 8, 1894
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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481967
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Patent number 481,967
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Issue date Sep 6, 1892
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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432877
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Patent number 432,877
-
Issue date Jul 22, 1890
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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430173
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Patent number 430,173
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Issue date Jun 17, 1890
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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366916
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Patent number 366,916
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Issue date Jul 19, 1887
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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354333
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Patent number 354,333
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Issue date Dec 14, 1886
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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328345
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Patent number 328,345
-
Issue date Oct 13, 1885
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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314628
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Patent number 314,628
-
Issue date Mar 31, 1885
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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313387
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Patent number 313,387
-
Issue date Mar 3, 1885
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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270902
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Patent number 270,902
-
Issue date Jan 23, 1883
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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243994
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Patent number 243,994
-
Issue date Jul 5, 1881
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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239921
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Patent number 239,921
-
Issue date Apr 12, 1881
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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212768
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Patent number 212,768
-
Issue date Feb 25, 1879
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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209971
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Patent number 209,971
-
Issue date Nov 19, 1878
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS