Shigeki Yokoyama

Follow

Person

Tokyo, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Organic expander for lead storage battery
- Patent number 11,251,434
- Issue date Feb 15, 2022
- Nippon Paper Industries Co., Ltd.
- Shigeki Yokoyama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Optical transmission apparatus for digital devices
- Patent number 5,251,319
- Issue date Oct 5, 1993
- Koden Industry Co., Ltd.
- Chikao Wagai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
ORGANIC EXPANDER FOR LEAD STORAGE BATTERY
- Publication number 20210265635
- Publication date Aug 26, 2021
- Nippon Paper Industries Co., Ltd.
- Shigeki YOKOYAMA
- H01 - BASIC ELECTRIC ELEMENTS