Yasuharu Tahaka

Follow

Person

Migumo, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Oxygen permeable hard contact lens formed from styrene monomer cont...
- Patent number 4,594,401
- Issue date Jun 10, 1986
- Shin-Etsu Chemical Co., Ltd.
- Kozo Takahashi
- G02 - OPTICS