P

Inventor

YAN XUEFENG

CN10 patents
⚠️ This page may combine multiple inventors who share the name “YAN XUEFENG”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

UNIV CHINA GEOSCIENCES WUHAN

8 patents

SELECT NANTONG SAFETY PRODUCTS CO LTD

1 patent

SHANGHAI SELECT SAFETY PRODUCTS CO LTD

1 patent