Inventor

YU CHANGSONG

CN2 patents

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

WEIHAI ZHUOCHENG GAS SAFETY DEVICE CO LTD

1 patent

US10942059B2Mar 9, 2021

Online monitoring method for metering performance of diaphragm gas meter

WEIHAI ZHUOCHENG GAS SAFETY DEVICE CO LTD0 citations43

XIANG YANG

1 patent

US9046791B2Jun 2, 2015

Apparatuses and methods for detecting wave front abberation of projection objective system in photolithography machine

XIANG YANG0 citations31