Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7746627 | Portable electronic apparatus with improved audio quality through a curved and sloped surface of a housing | Koichi Yamaguchi | 2010-06-29 |
| 7576983 | Portable electronic apparatus with improved audio quality through a curved and sloped surface of a housing | Koichi Yamaguchi | 2009-08-18 |
| 5802476 | Cordless telephone system having base unit with speaker | Kazunori Nakajima, Hidekazu Sato, Hiroshi Miyamoto, Takashi Enomoto, Tsutomu Iwaoka | 1998-09-01 |