| Number | Name | Date | Kind |
|---|---|---|---|
| D127509 | Sears et al. | May 1941 | |
| D186596 | Schinske | Nov 1959 | |
| D186600 | Schinske | Nov 1959 | |
| D197009 | Hoffman | Dec 1963 | |
| D315139 | Blaha | Mar 1991 | |
| D315143 | Blaha | Mar 1991 | |
| 3056851 | Scott | Oct 1962 | |
| 4288657 | Swanson | Sep 1981 | |
| 4691079 | Blaha | Sep 1987 | |
| 4883921 | Legerius et al. | Nov 1989 |
| Entry |
|---|
| Ideal Catalog, 1961, p. 5, screw on connector circled at top of page. |