Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5480263 | Soil displacement hammer for replacing underground pipes | — | 1996-01-02 |
| 5413185 | Soil displacement hammer with movable head | — | 1995-05-09 |
| 5318135 | Soil displacement hammer with reversing mechanism | — | 1994-06-07 |
| 4974687 | Soil displacement hammer | — | 1990-12-04 |
| 4921055 | Soil displacement hammer | — | 1990-05-01 |
| 4618007 | Impact-action self-propelled mechanism for driving holes in the earth | — | 1986-10-21 |