Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4863066 | System for dispensing precisely metered quantities of a fluid and method of utilizing the system | Kent M. Negersmith | 1989-09-05 |
| 4811611 | Apparatus and method for pressure equalization in closed tube sampler | — | 1989-03-14 |
| 4799393 | Combined closed and open tube sampling apparatus and method | — | 1989-01-24 |