Inventor
CHAN HELEN LAI WA
HK4 patents
⚠️ This page may combine multiple inventors who share the name “CHAN HELEN LAI WA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
UNIV HONG KONG POLYTECHNIC
3 patentsUS6286747B1Sep 11, 2001
Ultrasonic transducer
UNIV HONG KONG POLYTECHNIC30 citations89
US7819013B2Oct 26, 2010
Method and apparatus for measuring oscillation amplitude of an ultrasonic device
UNIV HONG KONG POLYTECHNIC26 citations86
US6190497B1Feb 20, 2001
Ultrasonic transducer
UNIV HONG KONG POLYTECHNIC10 citations67