Hirokawa; Katsuhisa
Patent Applications and Registrations
Patent applications and USPTO patent grants for Hirokawa; Katsuhisa.The latest application filed is for "card system for collectively loading right of use in predetermined amount of money and method of processing the card".
- Hirokawa; Katsuhisa - Yokosuka JP
| Patent | Date |
|---|---|
| Card system for collectively loading right of use in predetermined amount of money and method of processing the card Grant 6,012,637 - Hirokawa , et al. January 11, 2 | 2000-01-11 |
| Portable storage medium processing system Grant 4,855,578 - Hirokawa , et al. August 8, 1 | 1989-08-08 |
| Programmable portable electronic device Grant 4,827,512 - Hirokawa , et al. May 2, 1 | 1989-05-02 |
| Portable medium Grant 4,766,294 - Nara , et al. August 23, 1 | 1988-08-23 |
| Memory card Grant 4,672,182 - Hirokawa June 9, 1 | 1987-06-09 |
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