Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886640 | Hot work tool steel with good temper resistance | Raymond M. Hemphill, John F. McGraw, Michael L. Schmidt, Bruce A. Smith, David E. Wert | 1989-12-12 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886640 | Hot work tool steel with good temper resistance | Raymond M. Hemphill, John F. McGraw, Michael L. Schmidt, Bruce A. Smith, David E. Wert | 1989-12-12 |