Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8104486 | Hair-increasing device and method of producing the same | Katsuo Sugai | 2012-01-31 |
| 6691714 | Wearer's own hair utilizing type wig and method for manufacturing the same | Toshio Yaguchi, Yoshihiko Isobedate, Katsuo Sugai, Ryuji Yamakawa, Shinkichi Kojima | 2004-02-17 |