ALEXANDRIA, Va., Sept. 15 -- United States Patent no. 12,739,993, issued on Sept. 15, was assigned to DELTA ELECTRONICS INC. (Taoyuan City, Taiwan).

"Cabinet assembly and shelf with pitch-defined compatibility for plug-in units" was invented by Guan-Chen Yin (Taoyuan City, Taiwan), Ching-Tang Chang (Taoyuan City, Taiwan), Chi-Shou Ho (Taoyuan City, Taiwan) and Chen-Chiang Su (Taoyuan City, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "This disclosure is directed to a fool-proof structure having a shelf and a plug-in unit. The shelf is defined with a socket and an opening, and a stopping portion and an actuating portion are provided on the socket, and the actuating portion and the stopping portion are...