ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,491,462, issued on Dec. 9, was assigned to HITACHI INDUSTRIAL EQUIPMENT SYSTEMS Co. LTD. (Tokyo).
"Safety work device" was invented by Takeshi Kaneko (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A safety work device having a plurality of HEPA filters in an exhaust system suppresses leakage of contaminants. The work device includes: a work space; a front shutter covering part of a front opening surface of the work space; a work opening portion below the front shutter, through which a worker puts hands to perform work; a rear port provided at a lower portion of a back surface of the work space to suction air; and an exhaust flow path provided behi...