Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9015868 | Fog-resistant structure and protective device for eyes | Kimio Matsumoto, Keishi Yoshikawa | 2015-04-28 |
| 7922324 | Synthetic resin lens and eye lens article thereof | Fumio Ishibashi, Keishi Yoshikawa | 2011-04-12 |