ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,508,771, issued on Dec. 30, was assigned to SHENZHEN TUOZHU TECHNOLOGY Co. LTD. (Shenzhen, China).
"3D printing system" was invented by Kaiwang Tian (Shenzhen, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "Various embodiments provide a filament replacement mechanism for a 3D printer and a 3D printing system. In those embodiments, the filament replacement mechanism includes: a support; a filament guide unit disposed on the support and including a plurality of secondary filament guide tubes and a filament guide opening connecting with the plurality of secondary filament guide tubes, where the filament guide opening is configured to be jointed with ...