ALEXANDRIA, Va., June 10 -- United States Patent no. RE50,414, issued on May 6, was assigned to Friedrich Air Conditioning LLC (San Antonio).
"Variable refrigerant package" was invented by Kevin L. Eicher (Seguin, Texas), George C. Cagle (San Antonio), Eduardo J. Guerrero (Helotes, Texas) and Bascom Clayton Cotner (San Antonio).
According to the abstract* released by the U.S. Patent & Trademark Office: "A variable refrigerant package air conditioner is shown that is easy to install in new construction with a unique base that causes collected mixture that overflows to drain outside the building. A control system is shown that has motors and compressor that are pulse width modulated so the air conditioner is infinitely variable while mainta...