Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11404936 | Portable apparatus for generating electricity | Martin Riddiford | 2022-08-02 |
| 6228200 | Belt press using differential thermal expansion | John A. Willis | 2001-05-08 |
| 5974935 | Belt splitting machine | John A. Willis, George H. Stoner, III, William J. Hayes | 1999-11-02 |