Ro Ishikawa

Follow

Person

Tokyo, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Light switch
- Patent number 4,265,513
- Issue date May 5, 1981
- Nippon Electric Co., Ltd.
- Shigeo Matsushita
- G02 - OPTICS
Information Patent Grant
Light coupling and branching device using light focusing transmissi...
- Patent number 4,213,677
- Issue date Jul 22, 1980
- Nippon Selfoc Company, Limited
- Shigetoki Sugimoto
- G02 - OPTICS