Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7372974 | Headphone with cord winder devices | Yuuji Yanagishita, Masaaki Tanaka, Fumio Usui | 2008-05-13 |
| 4901168 | Apparatus and method for recording and reproducing a digital signal | Shiro Yoshida, Satoru Nagashima | 1990-02-13 |