Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872233 | Street sweeper with cool springs supported drag shoe | — | 1989-10-10 |
| 4839026 | Catalytic cracking with reduced emissions of sulfur oxides | John W. Byrne, Harry E. Jacobs | 1989-06-13 |