Inventor

SUN ZHIHONG

CN3 patents

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

LI GUIHUA

2 patents

US8149998B2Apr 3, 2012

Method, system and device for playing enterprise color ringback tone

LI GUIHUA2 citations52

US8462916B2Jun 11, 2013

Method, system and device for playing enterprise color ringback tone

LI GUIHUA0 citations42

UNIV TIANJIN

1 patent

US9637502B2May 2, 2017

Crystal form of Cefathiamidine compound and preparation method therefor

UNIV TIANJIN0 citations46