Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE36811 | Solid phase extraction medium | Craig G. Markell, Donald F. Hagen | 2000-08-08 |
| 5279742 | Solid phase extraction medium | Craig G. Markell, Donald F. Hagen | 1994-01-18 |
JL
James D. Luedtke
Overall (All Time): #2,240,912 of 4,157,543Top 55%
2
Patents All Time