Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4597797 | Composition of matter useful for agglomerating a metal-containing ore material | Herm J. Roorda | 1986-07-01 |
| 4288245 | Process for producing agglomerates of metal containing ores and the product of the process | Herm J. Roorda | 1981-09-08 |