Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7966688 | Cleaning tool and cleaning element | Hajime Tsutanaga, Toshihiko Uenishi, Masaho Hayashi, Yoshinori Tanaka | 2011-06-28 |
| 7930794 | Cleaning tool | Hajime Tsutanaga, Toshihiko Uenishi, Masaho Hayashi, Yoshinori Tanaka | 2011-04-26 |