Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6053210 | Expandable plug and control method | Peter Glanville Chapman, Allan K. Wallace | 2000-04-25 |
| 6050800 | Sizing apparatus | Peter Glanville Chapman, Allan K. Wallace, Eino Holso, Jyri Jarvenkyla | 2000-04-18 |