Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5587445 | Highly oxygen-permeable heat-resistant material | Masahiro Matsumoto, Toshio Yamazaki, Shoji Ichinohe | 1996-12-24 |
| 5580498 | Method of producing contact lens with identifying mark permeating into lens | Akihisa Sugiyama, Kazuharu Niwa | 1996-12-03 |