Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5987143 | Method and apparatus for erasing acoustic echo | Takatoshi Okuno, Mikio Tohyama | 1999-11-16 |
| 5953432 | Line source speaker system | Ziqing Zhang | 1999-09-14 |
| 5604809 | Sound field control system | Hiroshi Tsubonuma | 1997-02-18 |
| 5604810 | Sound field control system for a multi-speaker system | — | 1997-02-18 |
| 5537733 | Method of manufacturing a nickel-metal hydride secondary cell | Hideaki Kozawa, Kazuo Kojima, Tomoyuki Ono, Hideaki Kitazume, Kouji Taguchi | 1996-07-23 |
| 5490867 | Method of making a rectangular nickel-metal hydride secondary cell | Hideaki Kozawa, Kazuo Kojima, Tomoyuki Ono, Hideaki Kitazume, Kouji Taguchi | 1996-02-13 |
| 5372897 | Rectangular nickel-metal hydride secondary cell | Hideaki Kozawa, Kazuo Kojima, Tomoyuki Ono, Hideaki Kitazume, Kouji Taguchi | 1994-12-13 |
| 5233664 | Speaker system and method of controlling directivity thereof | Keishi Saito, Sumio Hagiwara | 1993-08-03 |
| 5128999 | Sound field correcting apparatus | — | 1992-07-07 |
| 4509184 | Stereo sound system | — | 1985-04-02 |