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Haruhiko Seki
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Tokyo, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Screw joint for oil well pipe
Patent number
11,549,620
Issue date
Jan 10, 2023
JFE Steel Corporation
Takamasa Kawai
E21 - EARTH DRILLING MINING
Information
Patent Grant
Threaded joint for oil well tubing
Patent number
10,900,595
Issue date
Jan 26, 2021
JFE Steel Corporation
Takamasa Kawai
E21 - EARTH DRILLING MINING
Information
Patent Grant
Threaded joint for oil country tubular goods
Patent number
10,125,554
Issue date
Nov 13, 2018
JFE Steel Corporation
Takamasa Kawai
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Grant
Threaded joint for oil country tubular goods
Patent number
9,982,815
Issue date
May 29, 2018
JFE Steel Corporation
Takamasa Kawai
E21 - EARTH DRILLING MINING
Information
Patent Grant
Threaded joint for heavy-walled oil country tubular goods
Patent number
9,709,196
Issue date
Jul 18, 2017
JFE Steel Corporation
Takamasa Kawai
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
Information
Patent Application
SCREW JOINT FOR OIL WELL PIPE
Publication number
20210025523
Publication date
Jan 28, 2021
JFE STEEL CORPORATION
Takamasa KAWAI
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Application
THREADED JOINT FOR OIL WELL TUBING
Publication number
20190056049
Publication date
Feb 21, 2019
JFE STEEL CORPORATION
Takamasa Kawai
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Application
THREADED JOINT FOR HEAVY-WALLED OIL COUNTRY TUBULAR GOODS
Publication number
20160319966
Publication date
Nov 3, 2016
JFE STEEL CORPORATION
Takamasa Kawai
E21 - EARTH DRILLING MINING
Information
Patent Application
THREADED JOINT FOR OIL COUNTRY TUBULAR GOODS
Publication number
20160178095
Publication date
Jun 23, 2016
JFE STEEL CORPORATION
Takamasa Kawai
E21 - EARTH DRILLING MINING
Information
Patent Application
THREADED JOINT FOR OIL COUNTRY TUBULAR GOODS (AS AMENDED)
Publication number
20160130884
Publication date
May 12, 2016
JFE STEEL CORPORATION
Takamasa Kawai
E21 - EARTH DRILLING MINING