Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4351809 | Process for reducing phosphate ore | Robert A. Hard | 1982-09-28 |
| 4351813 | Process for producing phosphorus pentoxide or phosphorus or phosphoric acid | Robert A. Hard | 1982-09-28 |