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last 30 patents
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Patent Grant
Evaluation method and evaluation device of health state of well sit...
Patent number
11,867,594
Issue date
Jan 9, 2024
Yantai Jereh Petroleum Equipment & Technologies Co., Ltd.
Kaishen Liu
G06 - COMPUTING CALCULATING COUNTING
Patents Applications
last 30 patents
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Patent Application
MULTI-WINDING-MOTOR DRIVING SYSTEM, VARIABLE-FREQUENCY ELECTRIC DRI...
Publication number
20230283215
Publication date
Sep 7, 2023
YANTAI JEREH PETROLEUM EQUIPMENT & TECHNOLOGIES CO., LTD.
Shouzhe LI
E21 - EARTH DRILLING MINING
Information
Patent Application
EVALUATION METHOD AND EVALUATION DEVICE OF HEALTH STATE OF WELL SIT...
Publication number
20230092705
Publication date
Mar 23, 2023
YANTAI JEREH PETROLEUM EQUIPMENT & TECHNOLOGIES CO., LTD.
Kaishen LIU
G06 - COMPUTING CALCULATING COUNTING