Issued Patents All Time
Showing 26–50 of 62 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7602293 | Interrogator for RFID tag | Tsuyoshi Ohashi, Takuya Nagai, Kentaro Ushiyama | 2009-10-13 |
| 7545275 | Article management device, article management system, article management method, and RFID-tag producing apparatus | — | 2009-06-09 |
| 7224712 | Interrogator and tag of wireless communication system | Tsuyoshi Ohashi, Takuya Nagai | 2007-05-29 |
| 7109844 | Transponder, interrogator, and communication system | Tsuyoshi Ohashi, Takuya Nagai | 2006-09-19 |
| 7084739 | Communication system, and interrogator and transponder for the system | Tsuyoshi Ohashi, Takuya Nagai | 2006-08-01 |
| 6965442 | Document information communicating system | Tsuyoshi Ohashi | 2005-11-15 |
| 6756972 | Manually input data display system | Yoshiaki Komatsu, Tsuyoshi Ohashi, Takuya Nagai, Yoshitsugu Tomomatsu, Ryohei Komiya | 2004-06-29 |
| 6639585 | Coordinate reading device | Takuya Nagai, Tsuyoshi Ohashi | 2003-10-28 |
| 6212221 | Communication apparatus | Hironobu Wakayama | 2001-04-03 |
| 6151352 | Wireless communication using a frequency hopping method | Hiroshi Kuno | 2000-11-21 |
| 6111909 | Wireless communication system | — | 2000-08-29 |
| 5966665 | Wireless communication system communicable among a base unit and a plurality of handsets | — | 1999-10-12 |
| 5748421 | Magnetic recording disk | Riki Matsuda | 1998-05-05 |
| 5691831 | Optical beam scanning device with hologram disc | — | 1997-11-25 |
| 5618638 | Optical magnetic recording medium | — | 1997-04-08 |
| 5619350 | Optical scanning device | — | 1997-04-08 |
| 5554451 | Optical data recording medium | Yumiko Ohashi, Takuya Hamaguchi, Hideo Maruyama, Riki Matsuda | 1996-09-10 |
| 5496608 | Optical recording medium | Riki Matsuda | 1996-03-05 |
| 5404345 | Optical recording medium and tracking servo circuit adapted therefor using wobbled pits | — | 1995-04-04 |
| 5199024 | Optical data storage medium having embedded tracking information | Hideo Maruyama, Riki Matsuda, Yumiko Ohashi | 1993-03-30 |
| 5121137 | Color exposing device having optical modulator for producing modulated light beams for two or more colors | Yutaka Hattori | 1992-06-09 |
| 5095478 | Optical data storage medium having interference and flattening layers each having specific thickness for improved information reading and tracking reliability | Hideo Maruyama, Riki Matsuda, Yumiko Ohashi | 1992-03-10 |
| 5089358 | Optical recording medium | Hideo Maruyama, Yumiko Ohashi, Riki Matsuda | 1992-02-18 |
| 5011248 | Thin-film optical function element, and optical head using the same | — | 1991-04-30 |
| 4983499 | Method of forming waveguide lens having refractive index distribution | Makoto Suzuki, Shoji Yamada, Akihiro Suzuki | 1991-01-08 |