Issued Patents All Time
Showing 1–25 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11711642 | Earphones | — | 2023-07-25 |
| 11445293 | Earphones | — | 2022-09-13 |
| 10397685 | Earphone | Kenji Ogata, Yoshiyuki Watanabe | 2019-08-27 |
| 10168308 | Analysis device | Atsushi Watanabe, Chuichi Watanabe | 2019-01-01 |
| 10104477 | Speaker for generating sound based on digital signal | Kenji Ogata, Yoshiyuki Watanabe | 2018-10-16 |
| 10021473 | Digital speaker, speaker system, and earphones | Kenji Ogata, Yoshiyuki Watanabe | 2018-07-10 |
| 9567877 | Hermetically sealed lash adjuster | Shouji Katsumata | 2017-02-14 |
| 8261710 | Sealed lash adjuster and seal structure between first and second parts | Shouji Katsumata | 2012-09-11 |
| 8139806 | Earphone for placement in an ear | Hyeon-goo Yoon | 2012-03-20 |
| 7779805 | Sealed lash adjuster and method for adjusting amount of liquid sealed in sealed lash adjuster | Shouji Katsumata, Ryo KOJIMA, Junichi Kawakita | 2010-08-24 |
| 6190613 | Sample concentration device | Chuichi Watanabe, Kunitaka Sato, Masami Morikawa, Shin Tsuge | 2001-02-20 |
| 5781638 | Electro-acoustic transducer | Kazuhisa Kito, Kensaku Abe | 1998-07-14 |
| 5119203 | Monitor mounting fixture | Yoshiaki Honjo | 1992-06-02 |
| 4991550 | Oil pressure rush adjuster of a directly acting type | — | 1991-02-12 |
| 4609588 | Magnetic recording medium | Kiyotaka Okuyama, Kiyosumi Kanazawa | 1986-09-02 |
| 4600650 | Magnetic recording medium | Kiyotaka Okuyama, Kiyoto Kanazawa | 1986-07-15 |
| 4460651 | Magnetic recording medium | Kiyotaka Okuyama, Kiyoto Kanazawa | 1984-07-17 |
| 4459319 | Process for producing a magnetic recording medium | Kiyotaka Okuyama, Kiyoto Kanazawa | 1984-07-10 |
| 4404259 | Magnetic recording medium | Yukihiro Isobe, Kiyotaka Okuyama | 1983-09-13 |
| 4391864 | Magnetic recording medium | Kiyotaka Okuyama, Yukihiro Isobe | 1983-07-05 |
| 4389458 | Magnetic recording medium | Kiyotaka Okuyama | 1983-06-21 |
| 4370384 | Magnetic recording medium | Yukihiro Isobe, Kiyotaka Okuyama | 1983-01-25 |
| 4367264 | Magnetic recording medium | Yukihiro Isobe, Kiyotaka Okuyama | 1983-01-04 |
| 4361621 | Magnetic recording medium | Yukihiro Isobe, Kiyotaka Okuyama, Hideo Kobayashi | 1982-11-30 |
| 4357391 | Magnetic recording medium | Kiyotaka Okuyama | 1982-11-02 |