Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4976977 | Pelleting agent having energy value | Mark S. Johnson, Edward B. Beaver, Domingo Chavez | 1990-12-11 |
| 4775473 | Packaged absorbent | Mark S. Johnson, Rudolph C. Valenta | 1988-10-04 |