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Class Information
Number: 52/188
Name: Static structures (e.g., buildings) > Stepped; e.g., stair > Tread unit on horizontal tread member connected to riser
Description: Structure in which a horizontal surface (tread) member, is supported above another discrete horizontal member, the latter being connected to a vertical front member (riser).










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8640404 Hardwood stair tread overlay Feb. 4, 2014
8516771 Method of refacing a staircase Aug. 27, 2013
8499506 Modular element for making fixed ladders Aug. 6, 2013
8453395 Modular stairway system and kit therefor Jun. 4, 2013
8371090 Stair tread overlay and method Feb. 12, 2013
8316595 Collapsible staircase Nov. 27, 2012
8307603 Methods of constructing stair unit Nov. 13, 2012
8281526 Stairway tread and riser assembly Oct. 9, 2012
8266842 Stadium seating construction Sep. 18, 2012
8196361 Stairway Jun. 12, 2012
8141321 Stair tread overlay and method Mar. 27, 2012
8033063 Stair system Oct. 11, 2011
7971399 Stairway Jul. 5, 2011
7946085 Stair stringer assembly May. 24, 2011
7905060 Tiered seating system Mar. 15, 2011
7900403 Log staircase and a method of producing components for a log staircase Mar. 8, 2011
7849643 Structural step unit with run portion and rise portion Dec. 14, 2010
7845123 Staircase block and staircase construction method using the staircase block Dec. 7, 2010
7757443 Support system for stair treads Jul. 20, 2010
7739838 Quickly and easily assembleable portable bleacher Jun. 22, 2010
7469516 Modular staircase construction Dec. 30, 2008
7464505 Staircase finishing plate arrangement Dec. 16, 2008
7380376 Non-slip structure Jun. 3, 2008
7191568 Modular safety surface and method for preparing the same Mar. 20, 2007
7165362 Glass support member Jan. 23, 2007
7073297 Component and method for restoring a stairway Jul. 11, 2006
7047698 Exterior step system made from masonry units attached via a metal frame May. 23, 2006
6960273 Process for renovation of a staircase Nov. 1, 2005
6920725 False tread modules Jul. 26, 2005
6895717 Component and method for restoring a stairway May. 24, 2005
6826875 Temporary stairway rail and baluster support Dec. 7, 2004
6691469 Flashing for roof penetrations Feb. 17, 2004
6665987 Staircase, staircase repair device and methods of fabricating same Dec. 23, 2003
6634145 Modular stone stair system Oct. 21, 2003
6543191 Prefabricated stairway and method Apr. 8, 2003
6523310 Tread and handrail combination structure of a staircase Feb. 25, 2003
6516574 Modular stairway system, method for erecting stairway and kit therefor Feb. 11, 2003
6467234 Stairway system Oct. 22, 2002
6408577 Steps for swimming pool Jun. 25, 2002
6397529 Adjustable modular staircase Jun. 4, 2002
6374556 Concrete elevation assembly, hollow concrete block, and method of making Apr. 23, 2002
6345475 Stair guard Feb. 12, 2002
6318033 Staircase, staircase repair device and methods of fabricating same Nov. 20, 2001
6230454 Universal modular tread and riser unit May. 15, 2001
6176049 Concrete elevation assembly, hollow concrete block, and method of making Jan. 23, 2001
6173540 Stair tread Jan. 16, 2001
6155007 Surface tread for a spiral staircase Dec. 5, 2000
6125598 Modular traditional staircase Oct. 3, 2000
6112480 Modular Staircase Sep. 5, 2000
6082061 Stair tread Jul. 4, 2000

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