Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5316197 | Feeder for adding fibrous material to a conveyor having concrete ingredients | Hugh J. Tobler, Robert B. Sawdon | 1994-05-31 |
| 5284578 | Apparatus for treating sludge | Hugh J. Tobler | 1994-02-08 |
| 5277825 | Method for treating sludge | Hugh J. Tobler | 1994-01-11 |