Noriaki Tsunoda

Follow

Person

Tano, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Writing instrument with ink quantity of level detecting function
- Patent number 4,889,442
- Issue date Dec 26, 1989
- Mitsubishi Pencil Co., Ltd.
- Hiroshi Takagi
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES