Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8709147 | Method for producing aqueous dispersion of surface-treated carbon black particles and aqueous dispersion of surface-treated carbon black particles | Makoto Sekiyama, Tomoaki Kirino | 2014-04-29 |
| 6360089 | Radio apparatus with diversity antennas | — | 2002-03-19 |
| 6055422 | Radio apparatus with diversity antennas | — | 2000-04-25 |
| 6034636 | Planar antenna achieving a wide frequency range and a radio apparatus used therewith | — | 2000-03-07 |
| 6011964 | Helical antenna for a portable radio apparatus | — | 2000-01-04 |
| 5742717 | Optical star coupler | — | 1998-04-21 |
| 5602950 | Optical star coupler | Hideo Shimizu, Takeshi Kobayashi | 1997-02-11 |
| 5568580 | Optical star-coupler | Hideo Shimizu | 1996-10-22 |