Issued Patents 2005
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6940005 | Keyboard musical instrument for exactly producing tones and hammer sensor varying output signal exactly representing physical quantity of hammer | Shigeru Muramatsu, Tsutomu Sasaki | 2005-09-06 |
| 6933435 | Easily installable optical position transducer and keyboard musical instrument having the same | Shigeru Muramatsu, Shigeaki Sato | 2005-08-23 |
| 6933494 | Optical sensor heads exhibiting regularity in optical characteristics and optical sensor system using the same | Tomoyuki Ura, Tsutomu Sasaki | 2005-08-23 |
| 6870151 | Shutter, optical sensor system using the same and shutter holder incorporated therein | — | 2005-03-22 |