Inventor
ZHANG CHUNMEI
CN15 patents
⚠️ This page may combine multiple inventors who share the name “ZHANG CHUNMEI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SHENZHEN LE JIA DA SCIENCE AND TECH CO LTD
8 patentsUSD1015407SFeb 20, 2024
Projection screen
SHENZHEN LE JIA DA SCIENCE AND TECH CO LTD6 citations83
USD1034766SJul 9, 2024
Projection screen
SHENZHEN LE JIA DA SCIENCE AND TECH CO LTD2 citations70
USD1015752SFeb 27, 2024
Portable support curtain
SHENZHEN LE JIA DA SCIENCE AND TECH CO LTD2 citations70
USD1068910SApr 1, 2025
Projector stand
SHENZHEN LE JIA DA SCIENCE AND TECH CO LTD1 citations61
USD1079789SJun 17, 2025
Projection screen
SHENZHEN LE JIA DA SCIENCE AND TECH CO LTD0 citations60
USD1067308SMar 18, 2025
Projector screen
SHENZHEN LE JIA DA SCIENCE AND TECH CO LTD0 citations60
USD1060479SFeb 4, 2025
Projection screen
SHENZHEN LE JIA DA SCIENCE AND TECH CO LTD0 citations60
USD1028064SMay 21, 2024
Projection screen with stand
SHENZHEN LE JIA DA SCIENCE AND TECH CO LTD1 citations60
UNIV SOUTHWEST PETROLEUM
6 patentsUS10975284B2Apr 13, 2021
Well cementation working solution prepared from red mud, slag and waste drilling fluids
UNIV SOUTHWEST PETROLEUM1 citations56
US12509621B2Dec 30, 2025
Method for preparing heat-conductive cement slurry for well cementation
UNIV SOUTHWEST PETROLEUM0 citations53
US11603488B2Mar 14, 2023
Process for preparing metal-chelate retarder by sol-gel method
UNIV SOUTHWEST PETROLEUM0 citations53
US11786880B2Oct 17, 2023
Preparation method of the microcapsules for low-temperature well cementation to be used to control cement hydration heat
UNIV SOUTHWEST PETROLEUM0 citations46
US11345844B2May 31, 2022
Oil well cement slurry high-temperature suspension stabilizer prepared from oil-based shale drilling cuttings
UNIV SOUTHWEST PETROLEUM0 citations44
US10876945B2Dec 29, 2020
Method for evaluating breakage strength of first and second cemented surfaces of well cementation under dynamic load
UNIV SOUTHWEST PETROLEUM0 citations35