Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5521741 | Polarization plane switch and optical switching device using the same | Hiromitsu Umezawa, Yoichi Suzuki, Tomokazu Imura, Tsugio Tokumasu | 1996-05-28 |
| 4540500 | Low temperature sinterable oxide magnetic material | Michihiro Torii, Tomoyoshi Kosaka, Takeo Maeda | 1985-09-10 |