Referenced by|
| US4850159 | 23 Jan 1987 | 25 Jul 1989 | Irwin Seating Company | Collapsible seating system with automatically folding seats | | US5026119 | 14 Aug 1986 | 25 Jun 1991 | | Back support for motorcycles | | US6481789 | 7 Jun 2000 | 19 Nov 2002 | Center for Design Research and Development N.V. | Stackable chair |
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