Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D335557 | Powerhead for vacuum cleaner | Colin Overy, Michael D. Dolson, Ian F. Norton | 1993-05-11 |
| 4997209 | Universal adapter sleeve for central vacuum cleaning systems | Robert F. McGrath | 1991-03-05 |
| D281919 | Hot water extraction carpet cleaner | William E. Bartasevich | 1985-12-24 |
| 4247225 | Alignment device | Gerald D. Chickini, Jr., Gordon F. Musch, William E. Bartasevich | 1981-01-27 |