GENEVA, Oct. 9 -- ZHANG, Jing filed a patent application (CN2025/086744) for “ENGINE COMPRISING ANNULAR ROTORS”. With publication no. WO/2026/207802, here are the other details related to the patent application:
Kind: Initial Publication with ISR [A1]
IPC: B64G 1/40
Notably, the patent application was submitted under the International Patent Classification (IPC) system, which is managed by the World Intellectual Property Organization (WIPO).
Disclaimer: Curated by HT Syndication....