ALEXANDRIA, Va., March 3 -- United States Patent no. 12,566,280, issued on March 3, was assigned to Cedes AG (Landquart, Switzerland).
"Reversing detection for an elevator car door" was invented by Jianyong Wen (Sargans, Switzerland).
According to the abstract* released by the U.S. Patent & Trademark Office: "A light grid for mounting on an elevator car door for object detection and for determining periodic door movements, including transmitter elements that emits radiation with a specific intensity, receiver elements for receiving the radiation from an assigned transmitter element, and a control device for evaluating the receiver elements in regard to interruption of the radiation coming from an assigned transmitter element and for outpu...