Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4580641 | Method and apparatus for starting diesel type hammers | Henry A. Nelson Holland | 1986-04-08 |
| 4414918 | Distributor head for a pipe lining machine | Henry A. Nelson Holland | 1983-11-15 |