Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5139453 | Shape sorting educational toy | Brian Aiken, Patrick W. Brown | 1992-08-18 |
| 4189526 | Metal/oxygen cells and method for optimizing the active life properties thereof | John W. Cretzmeyer | 1980-02-19 |