| Number | Name | Date | Kind |
|---|---|---|---|
| D250383 | Ceccarelli | Nov 1978 | |
| D319255 | Beno et al. | Aug 1991 | |
| D409651 | Rellinger | May 1999 | |
| 3376650 | Cook | Apr 1968 | |
| 4116426 | Kessler | Sep 1978 | |
| 4382590 | Pandya et al. | May 1983 | |
| 5386654 | Kroenke | Feb 1995 | |
| 5557996 | Reber et al. | Sep 1996 | |
| 5673490 | Hill | Oct 1997 |
| Entry |
|---|
| Visual Systems, 1986/87, see circled cutting mat, p. 193. |