Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4829626 | Method for controlling a vacuum cleaner or a central vacuum cleaner | Jouko Harkonen | 1989-05-16 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4829626 | Method for controlling a vacuum cleaner or a central vacuum cleaner | Jouko Harkonen | 1989-05-16 |