Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4869392 | Medication dispenser and method of dispensing medication | Donald G. Ellis | 1989-09-26 |
| 4811844 | Dual layered card for permitting selective access to an object | Donald G. Ellis | 1989-03-14 |