Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4669242 | Apparatus for lining furnace walls | Steven Louis Johnson, James P. Leffingwell, John J. Musser, William H. Hedges, Thomas L. Robberts | 1987-06-02 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4669242 | Apparatus for lining furnace walls | Steven Louis Johnson, James P. Leffingwell, John J. Musser, William H. Hedges, Thomas L. Robberts | 1987-06-02 |