Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11418953 | Key information generation system and key information generation method | Masahiro Arakawa, Hiroaki Iwashita, Hidenobu Hanaki, Masahiko Oya | 2022-08-16 |
| 11220239 | Key information generation system and key information generation method | Masahiro Arakawa, Hiroaki Iwashita, Hidenobu Hanaki, Masahiko Oya | 2022-01-11 |
| 10647298 | Valet key control system and valet key | Masahiko Oya, Masahiro Arakawa, Yutaka Kubo | 2020-05-12 |
| 10596999 | Valet key and method for controlling valet key | Masahiko Oya, Masahiro Arakawa, Yutaka Kubo | 2020-03-24 |
| 10379368 | Rotary dial assembly | Hiroaki Yamaguchi, Shuri ARAKAWA | 2019-08-13 |
| 5868089 | Needle thread restraining device in a thread cutting sewing machine | Minemasa Nagashima | 1999-02-09 |