Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5490640 | Torque-actuated expansible shaft assembly for roll core | William R. Miller, John E. Olson | 1996-02-13 |
| 5445342 | Expansible shaft for roll core | William R. Miller | 1995-08-29 |
| 5372331 | Expansible shaft for roll core | William R. Miller | 1994-12-13 |