Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4353726 | Method and apparatus for preheating pulverous materials prior to their introduction into a melting furnace | — | 1982-10-12 |
| 4330315 | Method and apparatus for preheating pulverous materials prior to their introduction into a melting furnace | Frederick J. Nelson, Raymond S. Richards | 1982-05-18 |