Wataru Kumagai

Person

Tokyo, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Aluminum alloy substrate for magnetic disc and magnetic disc
- Patent number 12,243,570
- Issue date Mar 4, 2025
- Furukawa Electric Co., Ltd.
- Kotaro Kitawaki
- G11 - INFORMATION STORAGE
Information Patent Grant
Aluminum alloy disc blank for magnetic disc and magnetic disc
- Patent number 12,087,342
- Issue date Sep 10, 2024
- UACJ Corporation
- Kotaro Kitawaki
- G11 - INFORMATION STORAGE
Information 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 Applicationslast 30 patents

Information 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

Wataru Kumagai

Person

Patents Grantslast 30 patents

Aluminum alloy substrate for magnetic disc and magnetic disc

Aluminum alloy disc blank for magnetic disc and magnetic disc

Thin substrate built-in hard disk drive and base plate member for t...

Aluminum alloy substrate for magnetic disks, method for producing s...

Aluminum alloy substrate for magnetic disk, method for producing th...

Aluminum alloy substrate for magnetic disk, disk drive device, meth...

Patents Applicationslast 30 patents

THIN SUBSTRATE BUILT-IN HARD DISK DRIVE AND BASE PLATE MEMBER FOR T...

ALUMINUM ALLOY SUBSTRATE FOR MAGNETIC DISC AND MAGNETIC DISC

ALUMINUM ALLOY DISC BLANK FOR MAGNETIC DISC AND MAGNETIC DISC

ALUMINUM ALLOY DISC BLANK FOR MAGNETIC DISC AND MAGNETIC DISC

MAGNETIC DISK SUBSTRATE AND MAGNETIC DISK USING MAGNETIC DISK SUBST...

ALUMINUM ALLOY SUBSTRATE FOR MAGNETIC DISK, AND MAGNETIC DISK USING...

ALUMINUM ALLOY SUBSTRATE FOR MAGNETIC DISKS, AND MAGNETIC DISK USIN...

ALUMINUM ALLOY SUBSTRATE FOR MAGNETIC DISKS, METHOD FOR PRODUCING S...

ALUMINUM ALLOY SUBSTRATE FOR MAGNETIC DISK, DISK DRIVE DEVICE, METH...

ALUMINUM ALLOY SUBSTRATE FOR MAGNETIC DISK, METHOD FOR PRODUCING TH...

SUBSTRATE FOR A MAGNETIC DISK

ALUMINUM ALLOY SUBSTRATE FOR MAGNETIC DISK

METAL MEMBER FOR MAGNETIC STORAGE MEDIUM AND MAGNETIC STORAGE MEDIUM