Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4921217 | Ground rods and apparatus for forming and placing such rods | Harry C. van den Nieuwelaar | 1990-05-01 |
| 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 |
| 4577053 | Ground rod | — | 1986-03-18 |
| 4526437 | Electrical bracket | — | 1985-07-02 |
| 4526496 | Tapered thread cutting machine | Mark V. Samas | 1985-07-02 |