Issued Patents All Time
Showing 1–25 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5919381 | Bipolar electrical discharge machine which detects misfire | Akihiro Goto, Mitsuyoshi Wada | 1999-07-06 |
| 5869797 | Bipolar electrical discharge machine which adjusts voltage polarity based on short circuit detection | Akihiro Goto, Mitsuyoshi Wada | 1999-02-09 |
| 5828027 | Electrical discharge machine with tar build-up detector | Akihiro Goto, Mitsuyoshi Wada | 1998-10-27 |
| 5802181 | Theater sound system with upper surround channels | Michael J. Kohut | 1998-09-01 |
| 5753882 | Electrical discharge machine with pulses of both polarities | Akihiro Goto, Mitsuyoshi Wada | 1998-05-19 |
| 5748746 | Ceiling speaker and signal source | Michael J. Kohut | 1998-05-05 |
| 5717765 | Theater sound system with upper surround channels | Michael J. Kohut | 1998-02-10 |
| 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 |
| 5563668 | Motion picture film composition method | John Galt, Tomio Omata | 1996-10-08 |
| 5496984 | Electrical discharge machine and machining method therefor | Akihiro Goto, Atsushi Taneda, Tatsushi Sato, Yoshihito Imai | 1996-03-05 |
| 5485232 | Digital audio signal recording device for motion picture film and audio signal recording system for motion picture film employing the digital audio signal recording device | Etsuro Saito, Toshiyuki Shirasu, Koichi Yoshikawa | 1996-01-16 |
| 5194958 | Movie film to video conversion with correction of frame misalignment | James B. Pearman, John Galt | 1993-03-16 |
| 5191427 | Video post-production of material acquired on film | John W. Richards, Milan Krsljanin | 1993-03-02 |
| 5177615 | Apparatus for recovering a film signal from a television video signal | Tomio Omata | 1993-01-05 |
| 5143586 | Electrochemical machining process and equipment | Shigeo Yamada | 1992-09-01 |
| 5084755 | Apparatus and method for coverting cinematic images to video signals | — | 1992-01-28 |
| 5083001 | Waveform control device for electrical discharge machining apparatus | Yoshihide Kinbara, Morihisa Nishikawa | 1992-01-21 |
| 4945199 | Electric discharge machining method and device | Toshiaki Tanaka, Morihisa Nishikawa, Kooji Akamatsu, Masahiro Nakata, Atsushi Taneda | 1990-07-31 |
| 4757490 | Modulation abnormality detector for optical sound-recording system | Hidemichi Shirai | 1988-07-12 |
| 4734903 | Level control circuit for light beam recording apparatus | Hidemichi Shirai | 1988-03-29 |
| 4695696 | Electric discharge machine with control of the machining pulse's current value in accordance with the delay time | Kazuo Tsurumoto, Takeshi Yatomi, Masahiro Yamamoto | 1987-09-22 |