Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4824574 | Novel water softening process using membranes | John E. Cadotte | 1989-04-25 |
| 4812270 | Novel water softening membranes | John E. Cadotte | 1989-03-14 |
DW
David R. Walker
Filmtec: 1 patents #3 of 9Top 35%
Overall (1989): #29,240 of 140,708Top 25%
2
Patents 1989