Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5204048 | Method for making a bundle of helical tubes and apparatus for separating impurities from a polluted liquid | Robert S. Smith | 1993-04-20 |
| 5013435 | Clarifying system for liquids | Robert S. Smith | 1991-05-07 |