ALEXANDRIA, Va., June 25 -- United States Patent no. 12,339,230, issued on June 24, was assigned to The Swatch Group Research and Development Ltd (Marin, Switzerland).
"Portable modular unit for inspecting in a timepiece the presence of a lubricating agent or of an epilame" was invented by Jean-Bosco Thanh Khai Dinh (Fribourg, Switzerland).
According to the abstract* released by the U.S. Patent & Trademark Office: "A portable modular unit for inspecting in a timepiece the presence of a lubricating agent, or of an epilame, having fluorescent markers, from an excitation luminous flux of white light. The modular unit includes an optical housing forming a first module, a portable white light source (200) emitting an excitation luminous flux f...