Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4841934 | Oxygen pumping device for control of the air fuel ratio | Eleftherios M. Logothetis, Robert E. Hetrick, William C. Vassell | 1989-06-27 |
| 4840913 | Oxides of nitrogen detector | Eleftherios M. Logothetis | 1989-06-20 |