| Number | Name | Date | Kind |
|---|---|---|---|
| D254614 | Biller et al. | Apr 1980 | |
| D254615 | Evans et al. | Apr 1980 | |
| 2744982 | Smith, Jr. et al. | May 1956 | |
| 2834855 | Carpenter et al. | May 1958 | |
| 2910560 | Stroup et al. | Oct 1959 | |
| 4268811 | Evans et al. | May 1981 | |
| 4687277 | Biller | Aug 1987 |
| Entry |
|---|
| S&C Hinge on p. 29 of Electrical Construction and Maintenance, Jan. 1985. |
| S&C Photo Sheet 252-700 dated Jun. 20, 1988, (2 pp.). |
| S&C Descriptive Bulletin 252-30 dated Mar. 21, 1983, (28 pp.). |