Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7447522 | Card holding structure for cellular phone | Kazuya KUMAZAWA | 2008-11-04 |
| 6977352 | Transmissive key sheet, input keys using transmissive key sheet and electronic equipment with input keys | — | 2005-12-20 |
| D512713 | Portable wireless telephone | Jun Watanabe, Jin Sakai, Masakatsu Takizawa | 2005-12-13 |
| D505944 | Portable wireless telephone | Jun Watanabe, Jin Sakai, Masakatsu Takizawa | 2005-06-07 |
| D501851 | Portable wireless telephone | Jun Watanabe, Masakatsu Takizawa | 2005-02-15 |
| D476635 | Portable wireless telephone | Michio Nagai, Atsushi Ohta, Masaki Shimamura, Katsuya Sakaguchi, Kazuya KUMAZAWA +3 more | 2003-07-01 |