Issued Patents All Time
Showing 51–70 of 70 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5796845 | Sound field and sound image control apparatus and method | Mitsuhiko Serikawa, Ryou Tagami, Masaharu Matsumoto, Mikio Oda, Hiroko Numazu | 1998-08-18 |
| 5742688 | Sound field controller and control method | Michiko Ogawa, Masaharu Matsumoto, Toshihiko Date, Tadashi Tamura, Yasutoshi Nakama | 1998-04-21 |
| 5700153 | Relay device for rotating members | Satoshi Ishikawa, Hiroaki Iizuka | 1997-12-23 |
| 5684881 | Sound field and sound image control apparatus and method | Mitsuhiko Serikawa, Ryou Tagami, Masaharu Matsumoto, Mikio Oda, Hiroko Numazu | 1997-11-04 |
| 5677987 | Feedback detector and suppressor | Nobuyuki Seki, Kazuhiro Onizuka | 1997-10-14 |
| 5617478 | Sound reproduction system and a sound reproduction method | Ryou Tagami, Takeshi Norimatsu, Masaharu Matsumoto, Mikio Oda, Mitsuhiko Serikawa +1 more | 1997-04-01 |
| 5572591 | Sound field controller | Hiroko Numazu, Masaharu Matsumoto, Ryou Tagami, Mikio Oda | 1996-11-05 |
| 5442712 | Sound amplifying apparatus with automatic howl-suppressing function | Masaharu Matsumoto, Mitsuhiko Serikawa, Hiroko Numazu | 1995-08-15 |
| 5381482 | Sound field controller | Masaharu Matsumoto, Mitsuhiko Serikawa, Hiroko Numazu, Takeshi Norimatsu, Ryo Tagami +1 more | 1995-01-10 |
| 5375188 | Music/voice discriminating apparatus | Mitsuhiko Serikawa, Masaharu Matsumoto, Hiroko Numazu | 1994-12-20 |
| 5233661 | Sound field variable apparatus | Mitsuhiko Serikawa, Masaharu Matsumoto, Hiroko Numazu, Katsuaki Sato | 1993-08-03 |
| 5164840 | Apparatus for supplying control codes to sound field reproduction apparatus | Masaharu Matsumoto, Mitsuhiko Serikawa, Ryo Tagami, Katsuaki Sato, Hiroko Yoshida +1 more | 1992-11-17 |
| 5144673 | Reflection sound compression apparatus | Masaharu Matsumoto, Mitsuhiko Serikawa, Hiroko Yoshida, Katsuaki Sato | 1992-09-01 |
| 5123050 | Sound field control system | Mitsuhiko Serikawa, Masaharu Matsumoto, Katsuaki Sato | 1992-06-16 |
| 5073942 | Sound field control apparatus | Hiroko Yoshida, Mitsuhiko Serikawa, Masaharu Matsumoto, Katsuaki Sato | 1991-12-17 |
| 5023913 | Apparatus for changing a sound field | Masaharu Matsumoto, Katsuaki Satoh, Seiichi Ishikawa, Mitsuhiko Serikawa, Hikari Hashimoto | 1991-06-11 |
| 4896285 | Calculation of filter factors for digital filter | Seiichi Ishikawa, Masaharu Matsumoto, Katsuaki Satoh | 1990-01-23 |
| 4888808 | Digital equalizer apparatus enabling separate phase and amplitude characteristic modification | Seiichi Ishikawa, Masaharu Matsumoto, Katsuaki Satoh | 1989-12-19 |
| 4751739 | Apparatus and method for controlling tone quality | Mitsuhiko Serikawa, Hiroyuki Takewa, Katsuaki Sato | 1988-06-14 |
| 4465160 | Horn speaker | Noboru Mikami, Atsushi Yukiyoshi | 1984-08-14 |