Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4847457 | Methylphosphonic acid amine salt lubricant additives | Hermann O. Wirth | 1989-07-11 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4847457 | Methylphosphonic acid amine salt lubricant additives | Hermann O. Wirth | 1989-07-11 |