Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5075049 | Method for improving solvent containment | David W. Gillespie, Ervin Townsend Powers, Jr. | 1991-12-24 |
| 4248700 | Transit materials separator | Malcolm M. Paterson | 1981-02-03 |