Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6815603 | Unbreakable and economical optical sensor array and keyboard musical instrument using the same | Tadaharu Kato | 2004-11-09 |
| 6723759 | Recycled resin composition and method for producing the same | Kunihiro Takenaka, Tsutomu Yonekura, Toshiyuki Furuya | 2004-04-20 |
| 6723911 | Performance apparatus | Yasutoshi Kaneko | 2004-04-20 |
| 6713751 | Easily assembled optical fiber sensor and musical instrument using the same | Tsutomu Sasaki | 2004-03-30 |