Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4823061 | Stone expansion control for a honing machine | Michael A. Boulton, Joseph I. Roberts | 1989-04-18 |
| 4816731 | Honing machine | Michael A. Boulton, Joseph I. Roberts | 1989-03-28 |