Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886606 | Method of purifying condensate waters for steam regenerating equipment | David H. Clemens, Marvin J. Hurwitz | 1989-12-12 |
RW
Robert W. Walker
Overall (1989): #60,582 of 140,708Top 45%
1
Patents 1989