Issued Patents 1982
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D265857 | Carpet cleaning tool | John Michael Hayes | 1982-08-17 |
| 4327455 | Surface cleaning machine with hopper dumping mechanism | — | 1982-05-04 |
| 4328014 | Sweeper hopper with filter assembly | Christopher M. Knowlton | 1982-05-04 |