Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7352732 | Service providing apparatus, service providing program and service providing method | Akihiko Sugikawa, Shingo Tanaka | 2008-04-01 |
| 7076209 | Short range radio communication system with using improved authentication scheme | Akihiko Sugikawa | 2006-07-11 |
| 6940406 | Gate entry system using short range radio communications with user terminal devices | — | 2005-09-06 |
| 6809631 | Data transmitting and receiving method and portable communication terminal apparatus | Miwako Doi, Jota Suzuki, Noriyasu Kato | 2004-10-26 |
| 6744369 | Gate entry system using short range radio communications with user terminal devices | — | 2004-06-01 |
| 5761269 | X-ray computerized tomography system having cooling features | Naoki Sugihara, Hisashi Tachizaki, Tomiya Sasaki, Koichiro Kawano | 1998-06-02 |