ALEXANDRIA, Va., July 15 -- United States Patent no. 12,664,846, issued on June 23, was assigned to QUANTA COMPUTER INC. (Taoyuan City, Taiwan).
"System and method for detecting people entering and leaving field" was invented by Ying-Ru Chen (Taoyuan City, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for detecting people entering and leaving a field is provided. The method includes receiving, by a receiver arranged above an entrance, measurement signals transmitted by a transmitter equipped on a person, wherein the receiver has a first receiving antenna and a second receiving antenna, and the first receiving antenna and the second receiving antenna are dual-polarized antennas. The method in...