Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4835876 | Instrument chassis and body supports for pipeline survey pig | Steven G. Petermann, Michel Cabiran | 1989-06-06 |
| 4837157 | Sample preparation method for liquid chromatography | David C. Turnell | 1989-06-06 |