ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,544,636, issued on Feb. 10.
"Flat roll-up structure for rolling up net body" was invented by Benjamin Chen (Taichung, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "In a flat roll-up structure for rolling up net body flatly, at upper and lower end of net body, it is installed respectively with protruding object, meanwhile, at roll-up mechanism, it is installed with upper and lower positioning roller module to limit the movement scope of net body, therefore, when net body is to be expanded, net body, through the guidance of upper and lower positioning roller structure, can be withdrawn flatly; when protruding object used to roll up net body is lim...