Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4939810 | Portable vacuum cleaner | — | 1990-07-10 |
| 4905342 | Portable vacuum cleaner | — | 1990-03-06 |
| 4704765 | Portable vacuum cleaner | — | 1987-11-10 |
| 4426211 | Vacuum cleaner with dust disposal | Katuzi Ikezaki, Katsuhiko Umeda | 1984-01-17 |