Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D827948 | Futon dryer | Masayuki Miyawaki | 2018-09-04 |
| D827949 | Futon dryer | Masayuki Miyawaki | 2018-09-04 |
| D827950 | Futon dryer | Masayuki Miyawaki | 2018-09-04 |
| D569442 | Game device | Naoki Arikawa | 2008-05-20 |
| D508541 | Arcade game machine | Hiroshi Tsujino | 2005-08-16 |
| D507604 | Arcade game machine | Hiroshi Tsujino | 2005-07-19 |
| D507022 | Arcade game machine | Hiroshi Tsujino | 2005-07-05 |
| D503433 | Arcade game machine | Hiroshi Tsujino | 2005-03-29 |
| 6661289 | Voltage-to-current conversion circuit and OTA using the same | Nobuo Fujii, Sigetaka Takagi, Kazuyuki Wada | 2003-12-09 |