Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6649035 | Low energy and non-heat transferring crust breaking system | Theodor H. Horstmann, Joseph E. Foster | 2003-11-18 |
| 6637462 | Variable pressure control device | Joseph E. Foster | 2003-10-28 |
| 6609767 | Pneumatic control system | Dennis L. Mortenson, Joseph E. Foster | 2003-08-26 |