ALEXANDRIA, Va., April 7 -- United States Patent no. 12,594,407, issued on April 7, was assigned to BEIJING BOE TECHNOLOGY DEVELOPMENT Co. LTD. (Beijing) and BOE TECHNOLOGY GROUP Co. LTD. (Beijing).

"Preparation delivery assembly and device having multiple needles" was invented by Yongchun Lu (Beijing), Hui Li (Beijing), Pan Li (Beijing) and Chunping Long (Beijing).

According to the abstract* released by the U.S. Patent & Trademark Office: "A preparation delivery assembly includes: a first substrate, a second substrate, and at least two needles of different lengths. Two side walls are provided between the first and second substrates to define a first chamber. At least one first channel that is in communication with the first chamber is pr...