Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D380132 | Portable electric hammer drill | Naoki Matsunaga, Hideaki Hasegawa, Toshiaki Takagi, Seiichi Kodato | 1997-06-24 |
| 5592314 | Tunable wavelength filter formed by 2 lcds in series having opposite twist angles of n*.pi./2 and a dielectric mirror layer on each substrate | Yasuyuki Ogasawara | 1997-01-07 |