| Number | Name | Date | Kind |
|---|---|---|---|
| D68277 | Quam et al. | Sep 1925 | |
| D104627 | Hitchcock et al. | May 1937 | |
| D202045 | Oberlin | Aug 1965 | |
| 215447 | Canney | Sep 1869 | |
| 219597 | Smith | Dec 1870 | |
| 260635 | Lockwood | Sep 1881 | |
| 3264591 | D'Entremont | Aug 1966 | |
| 3360752 | Uptegraff, Jr. | Dec 1967 | |
| 4085395 | Billerbeck et al. | Apr 1978 |
| Entry |
|---|
| Dongan "Power Circuit Dry Type Transformers" 5/1/63, p. 4. (second item from top). |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 595177 | Mar 1984 |