Patents/Inventors

Ka Wing Cheng

Hong KongCN3 patents

4 Patents

US122923852025
Gemstone Colour Grading Process and Grading System
GOLDWAY TECHNOLOGY LIMITED
0 cites
US120302172024
Method of Marking a Diamond, Markings Formed from Such Methods and Diamonds Marked According to Such Method
MASTER DYNAMIC LIMITED
0 cites
US118798592024
Process for Determining the Type of a Diamond
GOLDWAY TECHNOLOGY LIMITED
0 cites
US118354662023
Diamond Clarity Measurement Process and System
Goldway Technology Limited
0 cites