Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4856167 | Method for producing near net ring gear forgings | Alvin M. Sabroff | 1989-08-15 |
| 4798077 | Method for producing a family of forged ring rolling preforms and forging die therefor | — | 1989-01-17 |