| Number | Date | Country | Kind |
|---|---|---|---|
| 88 3928 | Jun 1988 | FRX |
| Number | Name | Date | Kind |
|---|---|---|---|
| D255350 | Fujita et al. | Jun 1980 | |
| D296433 | Mizuno et al. | Jun 1988 |
| Entry |
|---|
| Siemans-Allis Contactor C21 pictured on p. 22, Industrial Equipment News 1-83. |
| Square D Contactor pictured on inside front cover Design News 10-7-85. |
| Square D Relays pictured on p. 190 Design News 12-2-85. |
| Cutler Hammer Relays pictured p. 21 Design News 8-5-85. |