Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886640 | Hot work tool steel with good temper resistance | Harrison A. Garner, Jr., John F. McGraw, Michael L. Schmidt, Bruce A. Smith, David E. Wert | 1989-12-12 |
| 4853181 | Hot work tool steel | David E. Wert | 1989-08-01 |
| 4832909 | Low cobalt-containing maraging steel with improved toughness | Michael L. Schmidt | 1989-05-23 |