| Number | Name | Date | Kind |
|---|---|---|---|
| D235606 | Petkwitz | Jul 1975 | |
| 3819906 | Gould, Jr. | Jun 1974 | |
| 4169222 | Tucker | Jul 1979 | |
| 4177369 | Fritts | Dec 1979 | |
| 4193049 | Salem | Mar 1980 | |
| 4328408 | Lawson | May 1982 |
| Entry |
|---|
| Foodservice Equipment Specialist, p. 5, Jul. 1979, "Digitraul" Temperature Monitoring. |