US Patent Issued to APEX BRANDS on Aug. 5 for "Photoelectric sensor controlled by pulse-frequency modulation" (Chinese Inventors)

ALEXANDRIA, Va., Aug. 6 -- United States Patent no. 12,379,472, issued on Aug. 5, was assigned to APEX BRANDS INC. (Apex, N.C.).

"Photoelectric sensor controlled by pulse-frequency modulation" was invented by Jiangming He (Shanghai), Bin Sun (Shanghai), Mingshuai Wang (Shanghai), Henglian Luo (Shanghai) and Jingru Wang (Suzhou, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A tool storage system is provided that includes a drawer, and an optical system configured to detect presence of an object in the drawer. The optical system includes a photoelectric sensor and processing circuitry. The photoelectric sensor includes a light transmitter configured to emit pulsed light, and a photoelectric receiver con...