ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,547,786, issued on Feb. 10, was assigned to SUZHOU GSTARSOFT COMPANY Ltd. (Suzhou, China).

"Cad collaborative design system" was invented by Wei Wang (Suzhou, China), Hui Xi (Suzhou, China), Tao Deng (Suzhou, China), Chuanjie Yuan (Suzhou, China), Jiang Liang (Suzhou, China) and Xiang Lu (Suzhou, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a CAD collaborative design system, for storing CAD files according to a timeline, and that facilitates restoration and review of versions created, modified, and updated at different times. The system stores the CAD files by means of summary files and incremental databases, the...