Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6491476 | Method and apparatus for the trenchless laying of pipework underground | — | 2002-12-10 |
| 6371220 | Pneumatically reversible ram drilling tool | Franz-Josef Puttmann | 2002-04-16 |