Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8491181 | Chronograph timepiece | Toshiyuki Fujiwara, Shigeo Suzuki, Masayuki Kawata | 2013-07-23 |
| 8274864 | Slip gear structure and timepiece equipped with the same | — | 2012-09-25 |
| 7961556 | Day display apparatus and watch having the same | Kei Hirano | 2011-06-14 |
| 6987712 | Analog chronograph timepiece having plural motors | Mamoru Watanabe, Yuichi Shino, Kei Hirano | 2006-01-17 |
| 6965544 | Electronic timepiece | Mamoru Watanabe, Yuichi Shino, Kei Hirano | 2005-11-15 |
| 6755567 | Hand motion irregularity suppressed timepiece | Mamoru Watanabe, Yuichi Shino, Kei Hirano | 2004-06-29 |