Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4797136 | Low rank coal by wet oxidizing, drying and cooling | Mark A. Siddoway, Neal D. Stidham | 1989-01-10 |
WM
William C. Machmer
Overall (1989): #43,744 of 140,708Top 35%
1
Patents 1989