Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5098164 | Abrasive jet manifold for a borehole miner | Walter G. Krawza, Steven W. Connors | 1992-03-24 |
| 4708214 | Rotatable end deflector for abrasive water jet drill | Walter G. Krawza, Steven W. Connors | 1987-11-24 |
| 4663893 | End deflector for abrasive water jet slot cutter | Walter G. Krawza, Steven W. Connors | 1987-05-12 |
| 4331975 | Instrumentation for surveying underground cavities | Walter G. Krawza | 1982-05-25 |