Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886606 | Method of purifying condensate waters for steam regenerating equipment | Marvin J. Hurwitz, Robert W. Walker | 1989-12-12 |
DC
David H. Clemens
Overall (1989): #123,645 of 140,708Top 90%
1
Patents 1989