ALEXANDRIA, Va., Nov. 11 -- United States Patent no. 12,468,260, issued on Nov. 11, was assigned to The Swatch Group Research and Development Ltd (Marin, Switzerland).
"Method for manufacturing luminescent hands" was invented by Pierpasquale Tortora (Neuchatel, Switzerland), Cedric Blatter (Commugny, Switzerland) and Cyrille Gernez (Boudry, Switzerland).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for manufacturing a luminescent hand for a horological movement, preferably for a watch. The method includes providing a support comprising a light guide and structuring an emergent surface of the light guide so as to extract a maximum amount of light from the luminescent hand. The luminescent hand includ...