Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4857165 | Oxygen sensing element and process of manufacturing the same | Fujio Ishiguro | 1989-08-15 |
| 4851105 | Oxygen sensing element and method for producing the same | Fujio Ishiguro | 1989-07-25 |
| 4835009 | Method of producing oxygen sensing element | Fujio Ishiguro | 1989-05-30 |