Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4813617 | Wet grinding machine | Arthur C. Knox, Jr. | 1989-03-21 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4813617 | Wet grinding machine | Arthur C. Knox, Jr. | 1989-03-21 |