Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8163230 | Rotary hearth furnace for treating metal oxide materials | Franklin G. Rinker | 2012-04-24 |
| 6406662 | Rotary hearth furnace with charge slot air shield | Lawrence D. Proshek | 2002-06-18 |
| 6182817 | Field replaceable helical flight | Franklin G. Rinker, James L. Howe | 2001-02-06 |
| 6152729 | Spray cooled furnace discharge assembly | Franklin G. Rinker, Deane A. Horne, Thomas J. Sack | 2000-11-28 |
| 5895215 | Charging apparatus for a rotary hearth furnance | Franklin G. Rinker, James L. Howe, Carl L. Porter | 1999-04-20 |