Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4905656 | Emission control valve with internal spring | Joseph T. Betterton, Alfred H. Glover, Thomas S. McKee | 1990-03-06 |
| 4905657 | Emission control valve with gas flow shut-off | Joseph T. Betterton, Alfred H. Glover, Thomas S. McKee | 1990-03-06 |
| 4886033 | Stabilized flow control valve | Joseph T. Betterton, Alfred H. Glover, Thomas S. McKee | 1989-12-12 |
| 4686952 | Controlled PCV valve | Thornton W. Zeigler, Jr., Joseph T. Betterton, Alfred H. Glover | 1987-08-18 |