Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D381988 | Speaker box | — | 1997-08-05 |
| D380756 | Combined digital audio disk player, tuner and tape recorder | — | 1997-07-08 |
| D370912 | Tape player | Tomoyuki Shudo | 1996-06-18 |
| D367756 | Portable carrying grip with belt | Tomoyuki Shudo | 1996-03-12 |
| D360636 | Speaker box | Osamu Sasago | 1995-07-25 |
| D325468 | Optical disc cartridge | — | 1992-04-21 |