ALEXANDRIA, Va., June 18 -- United States Patent no. 12,326,221, issued on June 10, was assigned to Daifuku Co. Ltd. (Osaka, Japan).
"Entry detection system" was invented by Yasuhiro Tsuda (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "In an entry detection system, detection of an object that is allowed to enter the region is appropriately disabled. An entry detection system for detecting an object entering a region includes: an entry detection sensor configured to detect whether or not a part of the object is present within an entry detection plane; a muting sensor section including a first unit and a second unit; and a control unit. The control unit disables the entry detection sensor in response to...