Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4557010 | Debris collection system for street sweepers | — | 1985-12-10 |
| 4555824 | Debris collection system for street sweepers | — | 1985-12-03 |
| 4525888 | Maintaining constant pick-up broom pattern | Douglas A. Bargiel, Edward M. Assony, Truong M. Ha | 1985-07-02 |
| 4457044 | Multiple flight elevator system | Garard C. Erdman, John L. Cottam, Leonard S. Cox | 1984-07-03 |