Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4844749 | Reagent bath for and method of treating a workpiece surface | Michael T. Ives | 1989-07-04 |
| 4840219 | Mixture and method for preparing casting cores and cores prepared thereby | — | 1989-06-20 |
| 4826545 | Method of heat treating metal parts using a washable synthetic quenchant | Anthony G. Meszaros | 1989-05-02 |