Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4766457 | Particulate material dispenser | Laurence S. Barker, Dan A. Hays, William H. Wayman | 1988-08-23 |
| 4640602 | Sheet feeder-stacker | Laurence S. Barker | 1987-02-03 |
| 4597571 | Sheet feeder stack support | H. William Gray | 1986-07-01 |
| 4214746 | Sorting apparatus | Glenn M. Herbert, Alistair J. Caldwell | 1980-07-29 |