Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6966390 | Pile hammer | — | 2005-11-22 |
| 6427987 | Radially compressed elastic rope | William Kenneth Donaldson | 2002-08-06 |
| 6000477 | Apparatus for applying additional momentum | William Kenneth Donaldson | 1999-12-14 |