Issued Patents 2004
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6740202 | Speaker diaphragm and method of manufacturing same | Toshihiro Ishigaki, Koji Maekawa, Tomoyuki Shimada | 2004-05-25 |
HS
Hideo Sekikawa
Tohoku Pioneer: 1 patents #13 of 51Top 30%
Overall (2004): #208,294 of 270,089Top 80%
1
Patents 2004