E04F 11/09

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Patent/Pub #TitleFiling DateIssue/Publication DatePatent Owner
9840847 Curved staircaseSep 02, 16Dec 12, 17Not available
9816274 Stair caseAug 28, 14Nov 14, 17CLICKSTAIR PTY LTD
9347224 Step-block precast stairMar 06, 15May 24, 16UMM AL-QURA UNIVERSITY
9309675 Stairway tread support device and systemSep 01, 14Apr 12, 16Not available
9091083 Adjustable staircaseMar 10, 14Jul 28, 15OTTAWA HOSPITAL RESEARCH INSTITUTE
8935894 Concrete stepSep 13, 13Jan 20, 15Not available
8919055 Pool liner retainerMar 15, 13Dec 30, 14P.I. INC.
8857115 Composite step treadOct 27, 11Oct 14, 14Trivector Manufacturing
8821067 Boat lift stepJun 07, 13Sep 02, 14Not available
8297010 Adjustable stair riser and method of installing sameMar 13, 09Oct 30, 12Not available
7849643 Structural step unit with run portion and rise portionDec 28, 04Dec 14, 10Intelligent Engineering (Bahamas) Limited
6467234 Stairway systemDec 09, 99Oct 22, 02Not available
6125598 Modular traditional staircaseMay 28, 98Oct 03, 00Not available
5916098 Swimming pool stepsAug 28, 97Jun 29, 99Not available
5799448 Adjustable closed-riser metal staircase systemSep 13, 96Sep 01, 98HARSCO TECHNOLOGIES CORPORATION
5794391 Reinforced fiberglass stepsFeb 05, 97Aug 18, 98Not available
5713166 Monocoque staircase and method for joining wooden piecesMay 23, 94Feb 03, 98Structures Monocoques Inc.
5660009 Metal stairway for a residenceJan 31, 95Aug 26, 97Not available
5461836 Structure of skid-proof plate for stairsApr 22, 94Oct 31, 95Not available