Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4842415 | Paint shaker | Michael H. Groves | 1989-06-27 |
| 4821875 | System for introducing additive into a container | Michael H. Groves, Digby R. Redshaw | 1989-04-18 |
| 4798287 | System for introducing flowable additive into a closed container | Michael H. Groves, Digby R. Redshaw | 1989-01-17 |