Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4838091 | Fludic oscillator flowmeters | Graham M. Tofield, Gary Lucas, Hardyal S. Kalsi | 1989-06-13 |
| 4810130 | Siphon weir with a ventilating mechanism | Hansjorg Brombach | 1989-03-07 |