Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4642953 | Moveable stair apparatus | — | 1987-02-17 |
| 4196312 | Accumulation live roller conveyor | David K. Stevens | 1980-04-01 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4642953 | Moveable stair apparatus | — | 1987-02-17 |
| 4196312 | Accumulation live roller conveyor | David K. Stevens | 1980-04-01 |