Issued Patents 2004
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6828495 | Drum and drumhead stretching mechanism therefor | — | 2004-12-07 |
NI
Norihiko Ishimatsu
Overall (2004): #145,341 of 270,089Top 55%
1
Patents 2004