Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9530547 | Laminated PTC thermistor element | Wataru Aoto, Yumin Saigo, Hayato Katsu | 2016-12-27 |
| 8187506 | Barium titanate-based semiconductor ceramic composition and barium titanate-based semiconductor ceramic device | Yoichi Kawase, Syunsuke Okuda, Yuichi Hirata | 2012-05-29 |
| 6522238 | Semiconductor ceramic and positive-temperature-coefficient thermistor | Yoshitaka Nagao, Toshiharu Hirota | 2003-02-18 |
| 6455454 | Semiconductor ceramic, semiconductor ceramic element and circuit protection element | Tetsukazu Okamoto, Toshiharu Hirota | 2002-09-24 |
| 6432558 | Semiconductor ceramic and semiconductor ceramic device | Tetsukazu Okamoto, Toshiharu Hirota, Yoshitaka Nagao | 2002-08-13 |
| 6362521 | Semiconductor ceramic and device using the same | Tetsukazu Okamoto, Toshiharu Hirota, Noriyuki Yamamoto | 2002-03-26 |
| 6346496 | Composite material for positive temperature coefficient thermistor, ceramic for positive temperature coefficient thermistor and method for manufacturing ceramics for positive temperature coefficient thermistor | Tetsukazu Okamoto, Toshiharu Hirota, Noriyuki Yamamoto | 2002-02-12 |
| 6187707 | Barium titanate-based semiconductive ceramic composition | Satoshi Kakihara, Toshiharu Hirota, Noriyuki Yamamoto | 2001-02-13 |
| 6133821 | PTC thermistor with improved flash pressure resistance | Takeo Haga | 2000-10-17 |
| 5939972 | Positive temperature characteristic thermistor and thermistor element | Yoshitaka Nagao, Toshiharu Hirota | 1999-08-17 |
| 5733833 | Semiconductive ceramic | Yoshiaki Abe, Takahiko Kawahara, Norimitsu Kito, Ryoichi Urahara | 1998-03-31 |