Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4862832 | Dispenser for the application of active components | Helmut Metzner | 1989-09-05 |
| 4863616 | Microbiological control process | Douglas D. Clarkson, Richard P. Clifford | 1989-09-05 |