Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889433 | Programmable apparatus and method for delivering microingredient feed additives to animals by weight | — | 1989-12-26 |
| 4815042 | Programmable apparatus and method for delivering microingredient feed additives to animals by weight | — | 1989-03-21 |
| 4808111 | Mathematics educating device | — | 1989-02-28 |