| Number | Name | Date | Kind |
|---|---|---|---|
| D263795 | Pagels | Apr 1982 | |
| D279261 | Blocksom et al. | Jun 1985 | |
| D294122 | Weber | Feb 1988 | |
| D331516 | Waring | Dec 1992 | |
| 1913006 | Smith | Aug 1932 | |
| 2656958 | Austin | Feb 1950 | |
| 2684787 | Charpiat | Jul 1954 | |
| 2760664 | D'Amico et al. | Aug 1956 | |
| 3348741 | Wooten | Oct 1967 | |
| 3581928 | Amand | Oct 1968 | |
| 3926341 | Lhoest | Dec 1975 | |
| 4651903 | Pagliai | Mar 1987 | |
| 4848660 | O'Connell | Jul 1989 | |
| 5154324 | Stratford | Oct 1992 |
| Entry |
|---|
| Diffrient, et al, Humanscale 7/8/9, pp. 4-6, 2 pages of drawings (1981). |