Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6913671 | Compact evaporation apparatus | James Bigham | 2005-07-05 |
| 6061924 | Batch sludge dehydrator | David L. Bigham | 2000-05-16 |
| 5566469 | Drying apparatus with rotatable housing | David L. Bigham | 1996-10-22 |