Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870848 | Tapered rolled thread bar joint | Harry C. van den Nieuwelaar, Geoff M. Bowmer | 1989-10-03 |
| 4819469 | Method for rolling tapered threads on bars | Harry C. van den Nieuwelaar, Geoff M. Bowmer | 1989-04-11 |