Inventor

GUAN XIAOFANG

CN3 patents

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

SONG YUQUAN

2 patents

US8082771B2Dec 27, 2011

Adjustable hydraulic press with both upper and lower double action

SONG YUQUAN3 citations54

US9163361B2Oct 20, 2015

Welding structure with double-inclined surface of no bumping and no vibration seamless rail with high load-bearing capability

SONG YUQUAN0 citations33

UNIV JILIN

1 patent

US10850637B2Dec 1, 2020

Electrified railway power grid system without negative sequence in whole process and without power supply networks at intervals

UNIV JILIN0 citations35