| Number | Name | Date | Kind |
|---|---|---|---|
| D375249 | Scherer | Nov 1996 | |
| 2634016 | Hagen | Apr 1953 | |
| 3199063 | Stuart | Aug 1965 | |
| 4059327 | Vann | Nov 1977 | |
| 4972045 | Primeau | Nov 1990 |
| Number | Date | Country |
|---|---|---|
| 2116121 | Sep 1983 | GBX |
| Entry |
|---|
| Leviton Cat. 1000-D; Sep. 1968; pp. 12 & 13; Various conventional openings in switching plates. |