Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4675935 | Control and monitor for a floor maintenance device | Joseph G. Kasper, Bruce F. Field, Keith R. Westrum | 1987-06-30 |
| 4634403 | Belt drive | Ralph C. Peabody | 1987-01-06 |
| 4615070 | Sweeper with speed control for brush and vacuum fan | Sherman B. Frederick, Paul W. Kimzey | 1986-10-07 |