|
| US4006910 | 16. Sept. 1975 | 8. Febr. 1977 | | Folding seat |
| US5318346 | 30. Apr. 1993 | 7. Juni 1994 | Steelcase Inc. | Chair with zero front rise control |
| US5540481 | 2. Mai 1994 | 30. Juli 1996 | Steelcase, Inc. | Chair with zero front rise control |
| US5630643 | 1. Juni 1993 | 20. Mai 1997 | | Upholstered chair with two-piece shell |
| US5662381 | 6. Juni 1995 | 2. Sept. 1997 | Steelcase Inc. | Chair construction and method of assembly |
| US5842264 | 27. Aug. 1997 | 1. Dez. 1998 | Steelcase Inc. | Chair construction and method of assembly |
| US7416248 | 3. Juli 2007 | 26. Aug. 2008 | | Adjustable configuration seating |