ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,487,288, issued on Dec. 2, was assigned to TATSUMI RYOKI Co. LTD (Tokyo).
"Load testing device" was invented by Toyoshi Kondo (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "In a load testing device, each of a first coil group and a fine adjustment coil group includes one or more coil sets including a U-phase coil, a V-phase coil, and a W-phase coil. When receiving power supply from a first test target power source, power from the first test target power source is supplied to the first coil group without passing through a bidirectional transformer, and is supplied to the fine adjustment coil group in a stepped-down state through the bidirectional t...