Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4809886 | Apparatus for controlling a flow of granular material | Hendrik A. Dirkse, Andrew M. Scott | 1989-03-07 |
WS
Wiecher Derk Evert Steenge
Overall (1989): #43,088 of 140,708Top 35%
1
Patents 1989