ALEXANDRIA, Va., Jan. 20 -- United States Patent no. 12,529,658, issued on Jan. 20, was assigned to Smart Pro Instrument Co. Ltd. (Thailand).
"Diamond and colorless gemstone multi-tester" was invented by Mehboob Alam (Bangkok), Raweerat Homyamyen Montilla (Samut Sakhon, Thailand) and Absalon James Montilla (Samut Sakhon, Thailand).
According to the abstract* released by the U.S. Patent & Trademark Office: "Hand-held, rechargeable multi-tester with 2 in 1 thermal and optical LED probe tip, for identifying Earth-mined diamond, Type IIa HPHT diamonds, Type IIa CVD diamond, Simulant and Moissanite (including F1). All-in-one testing probe having both thermal conductivity sensor and optical sensor. Testing probe uses copper tube with built-in o...