Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880460 | Powder metallurgy high speed tool steel article and method of manufacture | Edward J. Dulis, Carl J. Dorsch | 1989-11-14 |
| 4839139 | Powder metallurgy high speed tool steel article and method of manufacture | Edward J. Dulis, Carl J. Dorsch | 1989-06-13 |