Inventor

LI HUIFEN

CN4 patents

⚠️ This page may combine multiple inventors who share the name “LI HUIFEN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

SAINT GOBAIN PLACO

1 patent

US9133060B2Sep 15, 2015

Chemical additive for gypsum products

SAINT GOBAIN PLACO3 citations56

UNIV HONG KONG POLYTECHNIC

1 patent

US7619749B2Nov 17, 2009

Methods and apparatus of aligning surfaces

UNIV HONG KONG POLYTECHNIC3 citations55

GAO XIAOTONG

1 patent

US10793472B2Oct 6, 2020

Anti-sagging gypsum product and a method to manufacture

GAO XIAOTONG1 citations53

GUO XIAOFENG

1 patent

US8958063B2Feb 17, 2015

Illumination system for detecting the defect in a transparent substrate and a detection system including the same

GUO XIAOFENG0 citations34