Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6239576 | Safe Class-2 motor control circuit and method adapted for electric vacuum cleaning system suction motor and agitator motor control | James J. McCarthy | 2001-05-29 |
| 5050264 | Universal airflow vacuum cleaner module | — | 1991-09-24 |
| 4238689 | Vacuum cleaner control system | David Lee | 1980-12-09 |