Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8927618 | Dye composition for ophthalmic lens, method for producing colored ophthalmic lens using the same, and colored ophthalmic lens | Yuji Goto, Ichiro Ando | 2015-01-06 |
| 8870371 | Colored contact lens | Ichiro Ando, Yuji Goto, Kazuharu Niwa | 2014-10-28 |
| 8662663 | Hybrid soft contact lens, and production method and hydration treatment method thereof | Koji Otani, Kazuharu Niwa, Kazuhiko Nakada | 2014-03-04 |
| 8523878 | Method of producing medical instrument | Kohsuke Satake, Kazuharu Niwa, Yasuhiko Suzuki, Hiroko Nomura, Kazuhiko Nakada | 2013-09-03 |
| 7588334 | Contact lens | Kazuharu Niwa, Akihisa Sugiyama | 2009-09-15 |