Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10202661 | Recovering chrome from a tannery process | Dale F. Graham, Gary Rennerfeldt, John Lawrence Quinlain | 2019-02-12 |
| 9683270 | Method of recovering chrome from a tannery process | Dale F. Graham, Gary Rennerfeldt, John Lawrence Quinlain | 2017-06-20 |