Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6339567 | Method of and apparatus for optical information reproduction | Masayoshi Shimamoto, Takehiko Umeyama | 2002-01-15 |
| 6320830 | Optical information reproduction device and signal processing circuit used therein | Manabu Tsukamoto, Masayoshi Shimamoto, Kenji Goto, Takehiko Umeyama | 2001-11-20 |
| 6268752 | Master-slave flip-flop circuit | Kouji Takahashi | 2001-07-31 |
| 6137332 | Clock signal generator and data signal generator | Yasuhiro Okazaki | 2000-10-24 |
| 6075401 | Switching circuit and switched capacitor | Yasuhiro Okazaki | 2000-06-13 |
| 5300825 | Peak signal detecting device | Takehiko Umeyama | 1994-04-05 |