Issued Patents 1997
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5698115 | Electrical discharge machine | Akihiro Goto, Mitsuyoshi Wada | 1997-12-16 |
| 5681488 | Electrical discharge machine which uses voltages of opposite polarity | Akihiro Goto, Mitsuyoshi Wada | 1997-10-28 |
| 5603852 | Electrical discharge machine with an opposite polarity voltage applied during an electrode jump operation | Akihiro Goto, Mitsuyoshi Wada | 1997-02-18 |
| 5602923 | Theater sound system with upper surround channels | Michael J. Kohut | 1997-02-11 |
| 5596380 | Digital sound signal reproducing apparatus for projector | Toshiyuki Shirasu, Etsuro Saito | 1997-01-21 |