Inventor
OU FEIQI
CN4 patents
Patents
4 patentsUS12258989B2Mar 25, 2025
Connection lock for prefabricated components
GUANGZHOU METRO DESIGN & RES INST CO LTD0 citations44
US12209404B2Jan 28, 2025
Mechanical lock for building component connection
GUANGZHOU METRO DESIGN & RES INST CO LTD0 citations44
US11926982B2Mar 12, 2024
Assembled subway station and construction method thereof
GUANGZHOU METRO DESIGN & RES INST CO LTD0 citations44
US11821456B2Nov 21, 2023
Connection assembly for prefabricated components
GUANGZHOU METRO DESIGN & RES INST CO LTD0 citations44