Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4884677 | Package sortation conveyor | Thomas C. Yu, John J. Wilkins | 1989-12-05 |
| 4753339 | Accumulating conveyor of the low pressure type | Thomas C. Yu | 1988-06-28 |
| 4732259 | Sorting conveyor with cross-over | Thomas C. Yu | 1988-03-22 |
| 4717011 | Sorting conveyor with cross-over | Thomas C. Yu | 1988-01-05 |
| 4711341 | Package sortation conveyor | Thomas C. Yu, John J. Wilkins | 1987-12-08 |
| 4488639 | Roller conveyor with friction roll device | Martin A. Heit | 1984-12-18 |
| 4473149 | Roller conveyor with friction roll drive | Martin A. Heit | 1984-09-25 |
| 4344527 | Roller conveyor with friction roll drive | Martin A. Heit | 1982-08-17 |