Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4638846 | Method of making thin-walled ductile iron castings | Allen D. Ackerman, Robert A. Martin, William M. Justusson | 1987-01-27 |
| 4372112 | Thin-walled exhaust gas manifold casting | Allen D. Ackerman, Robert A. Martin, William M. Justusson | 1983-02-08 |
| 4273182 | Core assembly and the method of making and using such assembly | Donald L. Winterhalter | 1981-06-16 |
| 4266595 | Use of mold venting practices in green sand molding for odor reduction | John L. Bell | 1981-05-12 |