Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4900445 | Low pressure hydrocyclone separator | David A. Flanigan, James E. Stolhand | 1990-02-13 |
| 4844817 | Low pressure hydrocyclone separator | David A. Flanigan, James E. Stolhand | 1989-07-04 |
| 4465000 | Method of increasing the efficiency of cyclone-fired boilers using high sodium lignite fuel | — | 1984-08-14 |