Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5604809 | Sound field control system | Hirofumi Yanagawa | 1997-02-18 |
HT
Hiroshi Tsubonuma
Overall (1997): #140,210 of 185,788Top 80%
1
Patents 1997