Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4858387 | Apparatus for grinding a workpiece | Arthur H. Clough | 1989-08-22 |
| 4850146 | Apparatus for grinding a workpiece | Arthur H. Clough | 1989-07-25 |
| 4831782 | Apparatus for grinding a workpiece | Arthur H. Clough, Joseph A. Borbone | 1989-05-23 |