|
| US3982785 | 29 Jul 1974 | 28 Sep 1976 | Center for Design Research and Development | Chair |
| US4441757 | 3 Feb 1981 | 10 Apr 1984 | | Structural joint for folding chair |
| US5064243 | 2 Aug 1990 | 12 Nov 1991 | | Apparatus and method for use in hospitals to promote patient-caregiver contact |
| US5524966 | 23 Nov 1994 | 11 Jun 1996 | Pro-Cord S.r.l. | Folding chair with tilting backrest |
| US6481789 | 7 Jun 2000 | 19 Nov 2002 | Center for Design Research and Development N.V. | Stackable chair |
