Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D288437 | Audio mixer | Sigeru Hasegawa, Haruki Takita, Junko Suzuki, Kouji Suzuki | 1987-02-24 |
| D287726 | Disc drive assembly | Sigeru Hasegawa, Haruki Takita, Kouji Suzuki | 1987-01-13 |
| D273950 | Audio mixer | Sigeru Hasegawa, Haruki Takita, Kouzi Suzuki | 1984-05-22 |
| D273676 | Audio mixer | Sigeru Hasegawa, Haruki Takita, Kouzi Suzuki | 1984-05-01 |