Issued Patents 1997
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5658362 | Vacuum cleaner and filter bag with air management | — | 1997-08-19 |
| 5651811 | Filter system | Philip H. Stevenson | 1997-07-29 |
| 5641343 | Room air cleaner | — | 1997-06-24 |
| 5603741 | Vacuum cleaner and filter bag with air management | — | 1997-02-18 |
| 5593479 | Filter system | Philip H. Stevenson | 1997-01-14 |