ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,499,530, issued on Dec. 16, was assigned to Lennox Industries Inc. (Richardson, Texas).

"Digital fingerprints generated from coil brazing" was invented by Satish Seshayya (Plano, Texas) and Vinay R. Thatigutla (Frisco, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "A system is configured to receive video footage of evaporator coil slabs after they exit an automated coil brazer. The system is further configured to convert the video footage to greyscale and isolate frames from the greyscale video footage. Each frame comprises an image of a different evaporator coil slab. The system is further configured to generate a first digital fingerprint compri...