Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5265977 | Method and apparatus for treating contaminated soil | Frank H. Weirich, Jon K. Hake | 1993-11-30 |
| 5161326 | Method and apparatus for treating contaminated soil | Frank H. Weirich, Jon K. Hake | 1992-11-10 |