ALEXANDRIA, Va., Dec. 23 -- United States Patent no. 12,501,846, issued on Dec. 23, was assigned to NATIONAL CHUNG HSING UNIVERSITY (Taichung, Taiwan).

"Automatic precise pneumatic plug tray seeder device" was invented by Hao-Ting Lin (Taichung, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An automatic precise pneumatic plug tray seedling device comprises a body, a plug tray platform, a seed groove, an air pressure source, a control device, a conveyor device, a soil punching device, and a seed device. To become an automatic control of a closed loop of a pneumatic cylinder, it adjusts the input control signals through the track positioning control in the control device and the feedback signal conveye...