Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6823729 | Measuring weir for measuring flow volume at an overflow | — | 2004-11-30 |
| 5044394 | Apparatus for regulating am outflow | — | 1991-09-03 |
| 4816156 | Hydro-dynamic separator | Heinrich Hohlwegler | 1989-03-28 |
| 4810130 | Siphon weir with a ventilating mechanism | Eric Markland | 1989-03-07 |