ALEXANDRIA, Va., July 30 -- United States Patent no. 12,372,809, issued on July 29, was assigned to HOYA LENS THAILAND LTD. (Pathumthani, Thailand).
"Spectacle lens production method" was invented by Yuji Hoshi (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for producing a spectacle lens 2 including a base portion 2 that is made of a resin material and includes a convex object-side face and a concave eyeball-side face, and an optical element 12 that is made of a material different from the material for forming the base portion and is embedded in the base portion, is described. The method includes: arranging an optical element in a cavity 28 of a mold including a first mold part 20 and a secon...