Inventor

CHO KAI-YI

TW2 patents

Patents

2 patents

US11990100B2May 21, 2024

E-paper identification card system and e-paper identification card

E INK HOLDINGS INC0 citations53

US12112217B2Oct 8, 2024

Electronic card receiving device and method of using electronic card receiving device

E INK HOLDINGS INC0 citations43