Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5054933 | Mixing device with means to introduce and extract gaseous material | Michael Derksen | 1991-10-08 |
| 4957373 | Method and apparatus for mixing bulk materials in powdered or granular form | Michael Derksen | 1990-09-18 |