Inventor record

CHA CHANG Y

This page previously combined 2different people who filed under the same name. Pick the inventor you're looking for — each profile now covers one disambiguated person.

• 99Chang Y. Cha80 patent records·2,900 citations·E21B B01D E21C41 on this record
• 87William J. Bartel7 patent records·240 citations·E21B E21C2 on this record

Inventor identities via PatentsView disambiguation — see methodology.