Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873489 | Method and apparatus for measurement of charge entrained in fluids | Alfred Morin, Markus Zahn | 1989-10-10 |
| 4818627 | Article of manufacture | Stuart Inkpen | 1989-04-04 |
| 4814690 | Apparatus and methods for measuring permittivity in materials | Mark C. Zaretsky | 1989-03-21 |