Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5715324 | Speaker having magnetic circuit | Kei Tanabe, Shigeki Takei | 1998-02-03 |
| 5370158 | Weft winder for weaving machine having magnets with different surface flux density | Masao Ogata | 1994-12-06 |
| 5096763 | Magnet article for attracting foreign matters in the stomach | Masao Ogata | 1992-03-17 |
| 4670726 | Convergence device for electron beams in color picture tube | Masao Ogata | 1987-06-02 |
| 4412104 | Rectangular magnetic circuit for speaker | Osamu Fujita, Noriaki Goshi, Shinya Okayasu, Motoharu Shimizu | 1983-10-25 |