Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6124012 | Solid phase extraction disk and apparatus for enhanced recovery and precision | Walter Jones, James C. Robbins, Joseph Stefkovich | 2000-09-26 |
| 5849249 | Solid phase extraction apparatus for enhanced recovery and precision | Walter Jones, James C. Robbins, Joseph Stefkovich | 1998-12-15 |
| 5368729 | Solid phase extraction device | Joseph Stefkovich | 1994-11-29 |