Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6645433 | Ergonomic return springless manual air displacement pipette | William D. Homberg, James S. Petrek | 2003-11-11 |
| 6568288 | Pipette with improved pipette tip and mounting shaft | James S. Petrek | 2003-05-27 |