Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4836929 | Process for breaking down organic substances and/or microbes in pretreated feed water for high-purity water recirculation systems | Samuel Stucki | 1989-06-06 |
| 4822002 | Movable sleeve type valve | — | 1989-04-18 |