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| US4245849 | 13 Nov 1978 | 20 Ene 1981 | Les Entreprises Rotot Ltee | Collapsible support devices and structure |
| US5938878 | 16 Ago 1996 | 17 Ago 1999 | Sentinel Products Corp. | Polymer structures with enhanced properties |
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| US7434888 | 29 Nov 2006 | 14 Oct 2008 | | Chair having adjustable weight proportion accepting elements |
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| US8182031 | 27 Ene 2010 | 22 May 2012 | | Poker kit with chairs and table |
| USD526497 | 4 Mar 2005 | 15 Ago 2006 | Juan E. Snell | Chair with checker/chess board motif and game pieces |
