Takeo Yamashita

Person

Hachioji, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Duty compensation circuit
- Patent number 8,421,512
- Issue date Apr 16, 2013
- Hitachi, Ltd.
- Tomoo Murata
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Semiconductor device with improved wiring arrangement utilizing a p...
- Patent number 7,245,019
- Issue date Jul 17, 2007
- Hitachi, Ltd.
- Tomoo Murata
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Overshoot current phase/amplitude control for hard disk drive write...
- Patent number 7,154,687
- Issue date Dec 26, 2006
- Hitachi Global Storage Technologies Japan, Ltd.
- Hiroshi Ikekame
- G11 - INFORMATION STORAGE
Information Patent Grant
Overshoot current phase/amplitude control for hard disk drive write...
- Patent number 6,870,697
- Issue date Mar 22, 2005
- Hitachi, Ltd.
- Hiroshi Ikekame
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic head and magnetic recording and reproducing apparatus usin...
- Patent number 5,463,518
- Issue date Oct 31, 1995
- Hitachi, Ltd.
- Shigekazu Otomo
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic head having main and auxiliary magnetic paths
- Patent number 5,247,415
- Issue date Sep 21, 1993
- Hitachi, Ltd.
- Noriyuki Kumasaka
- G11 - INFORMATION STORAGE
Information Patent Grant
Rotating drum having a center of gravity in registry with an axis o...
- Patent number 5,159,505
- Issue date Oct 27, 1992
- Hitachi, Ltd.
- Yasuaki Horiuchi
- G11 - INFORMATION STORAGE
Information Patent Grant
Longitudinal magnetic recording media and magnetic memory units
- Patent number 5,147,732
- Issue date Sep 15, 1992
- Hitachi, Ltd.
- Yoshihiro Shiroishi
- G11 - INFORMATION STORAGE
Information Patent Grant
Amorphous magnetic alloy of Co-Nb-Zr system and magnetic head made...
- Patent number 4,972,285
- Issue date Nov 20, 1990
- Hitachi, Ltd.
- Shigekazu Otomo
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Magnetic recording medium
- Patent number 4,939,045
- Issue date Jul 3, 1990
- Hitachi, Ltd.
- Kazuetsu Yoshida
- G11 - INFORMATION STORAGE
Information Patent Grant
Floating magnetic head having a magnetic core buried in a channel o...
- Patent number 4,851,942
- Issue date Jul 25, 1989
- Hitachi, Ltd.
- Niroyuki Kumasaka
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic head having short distance between gaps for recording repr...
- Patent number 4,847,715
- Issue date Jul 11, 1989
- Hitachi, Ltd.
- Noriyuki Kumasaka
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic head having improved track width narrowing grooves
- Patent number 4,803,338
- Issue date Feb 7, 1989
- Hitachi, Ltd.
- Noriyuki Kumasaka
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic head having an integrated recording and playback head and...
- Patent number 4,774,616
- Issue date Sep 27, 1988
- Hitachi, Ltd.
- Noriyuki Kumasaka
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic head having ferromagnetic amorphous alloy multi-layered film
- Patent number 4,769,729
- Issue date Sep 6, 1988
- Hitachi, Ltd.
- Noriyuki Kumasaka
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic head made from amorphous magnetic film
- Patent number 4,766,039
- Issue date Aug 23, 1988
- Hitachi, Ltd.
- Shigekazu Otomo
- G11 - INFORMATION STORAGE
Information Patent Grant
Multilayered ferromagnetic amorphous alloy film and magnetic head e...
- Patent number 4,748,089
- Issue date May 31, 1988
- Hitachi, Ltd.
- Noriyuki Kumasaka
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Composite type magnetic head with non-magnetic member in coil mount...
- Patent number 4,745,507
- Issue date May 17, 1988
- Hitachi, Ltd.
- Shigekazu Otomo
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording and reproducing system with composite magnetic head
- Patent number 4,731,683
- Issue date Mar 15, 1988
- Hitachi, Ltd.
- Shigekazu Otomo
- G11 - INFORMATION STORAGE
Information Patent Grant
Composite type magnetic head for recording and reproducing high fre...
- Patent number 4,656,547
- Issue date Apr 7, 1987
- Hitachi, Ltd.
- Noriyuki Kumasaka
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic film structure
- Patent number 4,610,935
- Issue date Sep 9, 1986
- Hitachi, Ltd.
- Noriyuki Kumasaka
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording and reproducing apparatus
- Patent number 4,571,652
- Issue date Feb 18, 1986
- Hitachi, Ltd.
- Hideo Fujiwara
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic head and method of fabricating same
- Patent number 4,559,572
- Issue date Dec 17, 1985
- Hitachi, Ltd.
- Noriyuki Kumasaka
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic head
- Patent number 4,439,794
- Issue date Mar 27, 1984
- Hitachi, Ltd.
- Yoshihiro Shiroishi
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

Information Patent Application
DUTY COMPENSATION CIRCUIT
- Publication number 20110316603
- Publication date Dec 29, 2011
- Hitachi, Ltd.
- Tomoo MURATA
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE
- Publication number 20100246078
- Publication date Sep 30, 2010
- Hitachi, Ltd.
- Yoshiyuki UTAGAWA
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
SEMICONDUCTOR STORAGE DEVICE
- Publication number 20100110751
- Publication date May 6, 2010
- Hitachi, Ltd.
- Kentaro Miyajima
- G11 - INFORMATION STORAGE
Information Patent Application
Overshoot current phase/amplitude control for hard disk drive write...
- Publication number 20050128618
- Publication date Jun 16, 2005
- Hitachi, Ltd.
- Hiroshi Ikekame
- G11 - INFORMATION STORAGE
Information Patent Application
Semiconductor device and a method of manufacturing the same
- Publication number 20040056280
- Publication date Mar 25, 2004
- Tomoo Murata
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Overshoot current phase/amplitude control for hard disk drive write...
- Publication number 20030234997
- Publication date Dec 25, 2003
- Hitachi, Ltd.
- Hiroshi Ikekame
- G11 - INFORMATION STORAGE

Takeo Yamashita

Person

Patents Grantslast 30 patents

Duty compensation circuit

Semiconductor device with improved wiring arrangement utilizing a p...

Overshoot current phase/amplitude control for hard disk drive write...

Overshoot current phase/amplitude control for hard disk drive write...

Magnetic head and magnetic recording and reproducing apparatus usin...

Magnetic head having main and auxiliary magnetic paths

Rotating drum having a center of gravity in registry with an axis o...

Longitudinal magnetic recording media and magnetic memory units

Amorphous magnetic alloy of Co-Nb-Zr system and magnetic head made...

Magnetic recording medium

Floating magnetic head having a magnetic core buried in a channel o...

Magnetic head having short distance between gaps for recording repr...

Magnetic head having improved track width narrowing grooves

Magnetic head having an integrated recording and playback head and...

Magnetic head having ferromagnetic amorphous alloy multi-layered film

Magnetic head made from amorphous magnetic film

Multilayered ferromagnetic amorphous alloy film and magnetic head e...

Composite type magnetic head with non-magnetic member in coil mount...

Magnetic recording and reproducing system with composite magnetic head

Composite type magnetic head for recording and reproducing high fre...

Magnetic film structure

Magnetic recording and reproducing apparatus

Magnetic head and method of fabricating same

Magnetic head

Patents Applicationslast 30 patents

DUTY COMPENSATION CIRCUIT

SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE

SEMICONDUCTOR STORAGE DEVICE

Overshoot current phase/amplitude control for hard disk drive write...

Semiconductor device and a method of manufacturing the same

Overshoot current phase/amplitude control for hard disk drive write...