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Wataru Kumagai
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Tokyo, JP
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Patents Grants
last 30 patents
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Patent Grant
Thin substrate built-in hard disk drive and base plate member for t...
Patent number
12,033,665
Issue date
Jul 9, 2024
UACJ Corporation
Kotaro Kitawaki
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Aluminum alloy substrate for magnetic disks, method for producing s...
Patent number
11,721,361
Issue date
Aug 8, 2023
UACJ Corporation
Kotaro Kitawaki
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Aluminum alloy substrate for magnetic disk, method for producing th...
Patent number
11,423,937
Issue date
Aug 23, 2022
UACJ Corporation
Kotaro Kitawaki
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Aluminum alloy substrate for magnetic disk, disk drive device, meth...
Patent number
11,335,367
Issue date
May 17, 2022
Furukawa Electric Co., Ltd.
Kimie Imakawa
G11 - INFORMATION STORAGE
Patents Applications
last 30 patents
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Patent Application
THIN SUBSTRATE BUILT-IN HARD DISK DRIVE AND BASE PLATE MEMBER FOR T...
Publication number
20240119967
Publication date
Apr 11, 2024
UACJ CORPORATION
Kotaro KITAWAKI
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Application
ALUMINUM ALLOY SUBSTRATE FOR MAGNETIC DISC AND MAGNETIC DISC
Publication number
20240021213
Publication date
Jan 18, 2024
UACJ CORPORATION
Kotaro KITAWAKI
G11 - INFORMATION STORAGE
Information
Patent Application
ALUMINUM ALLOY DISC BLANK FOR MAGNETIC DISC AND MAGNETIC DISC
Publication number
20240018633
Publication date
Jan 18, 2024
UACJ CORPORATION
Kotaro KITAWAKI
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Application
ALUMINUM ALLOY DISC BLANK FOR MAGNETIC DISC AND MAGNETIC DISC
Publication number
20230335161
Publication date
Oct 19, 2023
UACJ CORPORATION
Kotaro KITAWAKI
G11 - INFORMATION STORAGE
Information
Patent Application
MAGNETIC DISK SUBSTRATE AND MAGNETIC DISK USING MAGNETIC DISK SUBST...
Publication number
20230238027
Publication date
Jul 27, 2023
UACJ CORPORATION
Kotaro KITAWAKI
G11 - INFORMATION STORAGE
Information
Patent Application
ALUMINUM ALLOY SUBSTRATE FOR MAGNETIC DISK, AND MAGNETIC DISK USING...
Publication number
20230120845
Publication date
Apr 20, 2023
UACJ CORPORATION
Kotaro KITAWAKI
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Application
ALUMINUM ALLOY SUBSTRATE FOR MAGNETIC DISKS, AND MAGNETIC DISK USIN...
Publication number
20230111915
Publication date
Apr 13, 2023
UACJ CORPORATION
Kotaro KITAWAKI
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Application
ALUMINUM ALLOY SUBSTRATE FOR MAGNETIC DISKS, METHOD FOR PRODUCING S...
Publication number
20210151077
Publication date
May 20, 2021
Kotaro KITAWAKI
G11 - INFORMATION STORAGE
Information
Patent Application
ALUMINUM ALLOY SUBSTRATE FOR MAGNETIC DISK, DISK DRIVE DEVICE, METH...
Publication number
20210082465
Publication date
Mar 18, 2021
FURUKAWA ELECTRIC CO., LTD.
Kimie IMAKAWA
G11 - INFORMATION STORAGE
Information
Patent Application
ALUMINUM ALLOY SUBSTRATE FOR MAGNETIC DISK, METHOD FOR PRODUCING TH...
Publication number
20210065742
Publication date
Mar 4, 2021
UACJ CORPORATION
Kotaro KITAWAKI
G11 - INFORMATION STORAGE
Information
Patent Application
SUBSTRATE FOR A MAGNETIC DISK
Publication number
20190066724
Publication date
Feb 28, 2019
UACJ CORPORATION
Toshihiro NAKAMURA
G11 - INFORMATION STORAGE
Information
Patent Application
ALUMINUM ALLOY SUBSTRATE FOR MAGNETIC DISK
Publication number
20170327930
Publication date
Nov 16, 2017
UACJ CORPORATION
Kotaro Kitawaki
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Application
METAL MEMBER FOR MAGNETIC STORAGE MEDIUM AND MAGNETIC STORAGE MEDIUM
Publication number
20160042754
Publication date
Feb 11, 2016
FURUKAWA ELECTRIC CO., LTD.
Wataru Kumagai
G11 - INFORMATION STORAGE