Membership
Tour
Register
Log in
Hongfan Jiang
Follow
Person
Shanghai, CN
People
Overview
Industries
Organizations
People
Information
Impact
Patents Grants
last 30 patents
Information
Patent Grant
Automatic adjustment and control structure for writing liquid
Patent number
7,252,451
Issue date
Aug 7, 2007
Hongfan Jiang
B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Patents Applications
last 30 patents
Information
Patent Application
Automatic adjustment and control structure for writing liquid
Publication number
20070122229
Publication date
May 31, 2007
Hongfan Jiang
B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES