Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4922165 | Core and slot liner | Delmar E. Crawford | 1990-05-01 |
| 4842895 | Method of treating a core | Delmar E. Crawford | 1989-06-27 |
| 4788761 | Method of assembling a core and method of assembling a slot liner | Delmar E. Crawford | 1988-12-06 |