E04F 11/035

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Patent/Pub #TitleFiling DateIssue/Publication DatePatent Owner
9856653 Modular precast concrete stepsSep 14, 17Jan 02, 18Not available
9840847 Curved staircaseSep 02, 16Dec 12, 17Not available
9816274 Stair caseAug 28, 14Nov 14, 17CLICKSTAIR PTY LTD
9816275 Modular precast concrete stepsDec 21, 16Nov 14, 17Not available
9683372 Stair systems and wall assemblies comprising sameMar 18, 16Jun 20, 17Diamond Stairs Inc.
9580911 Stair tread and improved method of building a stairwayOct 07, 15Feb 28, 17TL FAB, LP
9499991 Stair modules which co operate to form a temporary stair caseFeb 11, 14Nov 22, 16Not available
9347224 Step-block precast stairMar 06, 15May 24, 16UMM AL-QURA UNIVERSITY
9212491 Modular stairwayMay 22, 15Dec 15, 15Not available
8966859 Staircase and method for constructionMar 05, 14Mar 03, 15Signature Companies
8707638 Staircase and method for constructionApr 03, 12Apr 29, 14Signature Companies
8316595 Collapsible staircaseApr 06, 10Nov 27, 12Not available
5475954 Modular support element adapted to form a support for a tread of a staircaseMar 14, 94Dec 19, 95Not available