E06C 1/28

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Patent/Pub #TitleFiling DateIssue/Publication DatePatent Owner
9359817 Dual-use modular carbon-fiber ladder and bridgeOct 21, 13Jun 07, 16ALLRED & ASSOCIATES INC.
9038775 Ladderway system for underground raisesDec 24, 10May 26, 15HIRAM (WA) PTY LTD
9016434 Ladders, ladder components and related methodsFeb 22, 12Apr 28, 15WING ENTERPRISES, INC.
5353892 Ladder joint for a folding collapsible ladderOct 14, 93Oct 11, 94Not available
4997061 Ladder assembly, particularly for use with swimming poolsAug 08, 89Mar 05, 91Not available
4947959 Folding ladderMar 14, 89Aug 14, 90Not available
4842098 Adjustable folding ladderOct 29, 87Jun 27, 89Not available
4754845 Step ladderOct 29, 87Jul 05, 88BAKER RESEARCH CO., INC.
4719990 Step ladder for stairsAug 27, 86Jan 19, 88Not available
4519478 Ladder extension couplingMay 17, 84May 28, 85BAY-LEA COMMERCIAL PRODUCTS, INC., A CANADIAN CORP., LOUISVILLE LADDER CORP., Supreme Aluminum Industries, Ltd.,
4428458 Foldable ladderMay 28, 81Jan 31, 84Turbo Inc.