INTERNATIONAL PATENT: CHANG, GUIYU, 常桂玉 FILES APPLICATION FOR "COMBINED DOOR AND WINDOW FRAME PROFILE STRUCTURE AND MANUFACTURING PROCESS"

GENEVA, Dec. 7 -- CHANG, Guiyu (Building 1, No.6598 Linhai Highway, Qingcun Town,Fengxian District, Shanghai 201400), 常桂玉 (中国上海市奉贤区青村镇林海公路6598号1幢) filed a patent application (PCT/CN2024/114085) for "COMBINED DOOR AND WINDOW FRAME PROFILE STRUCTURE AND MANUFACTURING PROCESS" on Aug 23, 2024. With publication no. WO/2025/246042, the details related to the patent application was published on Dec 04, 2025.

Notably, the patent application was submitted under the International Patent Classification (IPC) system, which is managed by the World Intellectual Property Organization (WIPO).

Inventor(s): YANG, Jing...