Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889129 | Apparatus for treatment of tumors | William R. Potter, Kenneth R. Weishaupt | 1989-12-26 |
| 4866168 | Hematoporphyrin derivatives and process of preparing | William R. Potter, Kenneth R. Weishaupt | 1989-09-12 |
| 4816736 | Polyphase alternator and dual voltage battery charging system for multiple voltage loads | Richard T. Johnson | 1989-03-28 |