| Number | Name | Date | Kind |
|---|---|---|---|
| D183659 | North | Oct 1958 | |
| D235068 | Burkhalter et al. | May 1975 | |
| D243956 | Clayton et al. | Apr 1977 | |
| D244316 | Bodell et al. | May 1977 | |
| D281502 | Wheeler | Nov 1985 | |
| 3983399 | Cox, Jr. et al. | Sep 1976 | |
| 4366574 | Hill | Dec 1982 |
| Entry |
|---|
| Medical & Biological Engineering & Computing, .TM.1979, p. 693, Automatic Outlining Technique for EMI Scanner Pictures. |