Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5353224 | Method for automatically controlling a travelling and cleaning operation of vacuum cleaners | Jin Seong Hwang | 1994-10-04 |
| 5293955 | Obstacle sensing apparatus for a self-propelled cleaning robot | — | 1994-03-15 |