Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D557676 | Conference telephone | Yasuhiro Sota, Masanobu Abe, Keiichi Nakayama, Hironori Ohata, Tsutomu Irishima | 2007-12-18 |
| D529894 | Telephone set | Keigo Yanagisawa, Teruaki Takigawa | 2006-10-10 |
| D515063 | Telephone set | Keigo Yanagisawa, Teruaki Takigawa | 2006-02-14 |