Seiji Kumagai

Person

Miyagi, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Magnetic tape, magnetic tape apparatus, servo pattern recording app...
- Patent number 8,089,716
- Issue date Jan 3, 2012
- Sony Corporation
- Jun Takayama
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic resistance element having four magnetization states and a...
- Patent number 6,535,364
- Issue date Mar 18, 2003
- Sony Corporation
- Seiji Kumagai
- G11 - INFORMATION STORAGE
Information Patent Grant
Method to manufacture magnetic tunneling elements using inductively...
- Patent number 6,519,123
- Issue date Feb 11, 2003
- Sony Corporation
- Junichi Sugawara
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic tunnel device, method of manufacture thereof, and magnetic...
- Patent number 6,452,892
- Issue date Sep 17, 2002
- Sony Corporation
- Seiji Kumagai
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Magnetic tunneling junction device
- Patent number 6,365,948
- Issue date Apr 2, 2002
- Sony Corporation
- Seiji Kumagai
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Magnetic tunneling element and manufacturing method therefor
- Patent number 6,312,840
- Issue date Nov 6, 2001
- Sony Corporation
- Seiji Kumagai
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Magnetic head with magnetic tunnel element in which induced magneti...
- Patent number 6,219,213
- Issue date Apr 17, 2001
- Sony Corporation
- Kazuo Goto
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Magnetic tunnel device
- Patent number 6,103,406
- Issue date Aug 15, 2000
- Sony Corporation
- Seiji Kumagai
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Magnetic head
- Patent number 5,936,815
- Issue date Aug 10, 1999
- Sony Corporation
- Seiji Kumagai
- G11 - INFORMATION STORAGE
Information Patent Grant
Manufacturing method for magnetic head
- Patent number 5,867,887
- Issue date Feb 9, 1999
- Sony Corporation
- Seiji Kumagai
- G11 - INFORMATION STORAGE
Information Patent Grant
Rotary magnetic head apparatus with circuitry for driving head and...
- Patent number 5,737,154
- Issue date Apr 7, 1998
- Sony Corporation
- Seiji Kumagai
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic head core arrangement having medium facing surface sides f...
- Patent number 5,515,222
- Issue date May 7, 1996
- Sony Corporation
- Seiji Kumagai
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic head
- Patent number 5,475,551
- Issue date Dec 12, 1995
- Sony Corporation
- Junichi Honda
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

Information Patent Application
MAGNETIC TAPE, MAGNETIC TAPE APPARATUS, SERVO PATTERN RECORDING APP...
- Publication number 20090161249
- Publication date Jun 25, 2009
- SONY CORPORATION
- Jun TAKAYAMA
- G11 - INFORMATION STORAGE

Seiji Kumagai

Person

Patents Grantslast 30 patents

Magnetic tape, magnetic tape apparatus, servo pattern recording app...

Magnetic resistance element having four magnetization states and a...

Method to manufacture magnetic tunneling elements using inductively...

Magnetic tunnel device, method of manufacture thereof, and magnetic...

Magnetic tunneling junction device

Magnetic tunneling element and manufacturing method therefor

Magnetic head with magnetic tunnel element in which induced magneti...

Magnetic tunnel device

Magnetic head

Manufacturing method for magnetic head

Rotary magnetic head apparatus with circuitry for driving head and...

Magnetic head core arrangement having medium facing surface sides f...

Magnetic head

Patents Applicationslast 30 patents

MAGNETIC TAPE, MAGNETIC TAPE APPARATUS, SERVO PATTERN RECORDING APP...