Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4430057 | Calciner screw construction | Donald P. Hoover, Ernst A. Siemssen | 1984-02-07 |
| 4256453 | Calciner screw construction | — | 1981-03-17 |
| 4218213 | Thermally conductive partition | — | 1980-08-19 |