Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6859837 | Service information providing method, service information providing apparatus and system | Minoru Watanabe | 2005-02-22 |
| 6028940 | Virtual shop computer network system which displays member shops and member shop certification method | Youko Tanaka, Katsuhisa Hirokawa | 2000-02-22 |
| 6012637 | Card system for collectively loading right of use in predetermined amount of money and method of processing the card | Katsuhisa Hirokawa, Youko Tanaka | 2000-01-11 |