Inventor

YEUNG WAI YI

HK2 patents

Patents

2 patents

US10830641B2Nov 10, 2020

Compact spectrometer having reflective wedge structure

HONG KONG APPLIED SCIENCE & TECH RESEARCH INST CO LTD3 citations63

US11333606B2May 17, 2022

Apparatus and method for visually inspecting gemstones

HONG KONG APPLIED SCIENCE & TECH RESEARCH INST CO LTD0 citations50