Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5245710 | Flush toilet and method | John M. Mayfield, Jr. | 1993-09-21 |
| 4918764 | Electrically operated toilet | John M. Mayfield, Jr. | 1990-04-24 |
| 4508132 | Temperature controlled valve mechanism and method | John M. Mayfield, Jr. | 1985-04-02 |
| 4424775 | Apparatus for maintaining a diesel engine in restarting condition | John M. Mayfield, Jr., Hugh A. Hinchliffe | 1984-01-10 |
| 4356833 | Temperature controlled valve mechanism and method | John M. Mayfield, Jr. | 1982-11-02 |