Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4209295 | Furnace with homogeneous refractory tubular liner | Carl E. Frahme | 1980-06-24 |
| 4202148 | Method of making thick-walled refractory fiber modules and the product formed thereby | Carl E. Frahme | 1980-05-13 |