P

Inventor

YANG QIGUI

CN6 patents
⚠️ This page may combine multiple inventors who share the name “YANG QIGUI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

CHANGJIANG SURVEY PLANNING DESIGN AND RES CO LTD

5 patents

CHANGJIANG RIVER SCIENT RESEARCH INSTITUTE

1 patent