Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE33649 | Butterfly valve having a function for measuring a flow rate and method of measuring a flow rate with a butterfly valve | — | 1991-07-30 |
| 4926903 | Butterfly valve having a function for measuring a flow rate and method of measuring a flow rate with a butterfly valve | — | 1990-05-22 |