Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8438690 | Cleaning tool and cleaning element holder | Yoshinori Tanaka, Masumi Fukuzawa, Masaho Hayashi | 2013-05-14 |
| 8156603 | Cleaning tool | Hajime Tsutanaga, Toshihiko Uenishi, Masaho Hayashi, Yoshinori Tanaka | 2012-04-17 |
| 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 |
| D608965 | Handle for a cleaning device | Yoshinori Tanaka, Masumi Fukuzawa, Masaho Hayashi | 2010-01-26 |