US Patent Issued to Hong Kong Applied Science and Technology Research Institute on Oct. 7 for "Continuous line for automatic diamond color grading evaluation" (Chinese Inventors)

ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,436,092, issued on Oct. 7, was assigned to Hong Kong Applied Science and Technology Research Institute Co. Ltd. (Hong Kong, Hong Kong).

"Continuous line for automatic diamond color grading evaluation" was invented by Yuelin Wang (Hong Kong, Hong Kong), Ziqi Wang (Hong Kong, Hong Kong) and Chun Zhang (Hong Kong, Hong Kong).

According to the abstract* released by the U.S. Patent & Trademark Office: "An automated diamond color-grading machine color grades a continuous line of diamonds without human color evaluation. A sample diamond is carried by an input conveyor and placed on a mount on a rotating plate by a robotic arm. The rotating plate has Nm mounts with Nr master stones of known c...