1
Hideki Sawaguchi, Yasutaka Nishida, Hisashi Takano, Hiroyuki Tsuchinaga: Apparatus, signal-processing circuit and device for magnetic recording system. Hitachi Global Storage Technologies Japan, Reed Smith, Stanley P Fisher Esq, Juan Carlos A Marquez Esq, March 10, 2009: US07502189 (128 worldwide citation)

To effectively suppress a signal in a low frequency region in which the medium noise and the signal distortion are concentrated, and in order to effectively utilize a detected component of the reproduced signal in the low frequency region, a target of partial response equalization to the perpendicul ...


2
Tomohiro Okada, Yoshiaki Kawato, Yasutaka Nishida, Yasuo Wakaki, Masafumi Mochizuki, Hisashi Takano: Single pole type recording head including tapered edges. Hitachi, Stanley P Fisher Esq, Juan Carlos A Marquez Esq, Reed Smith, March 23, 2004: US06710973 (62 worldwide citation)

A magnetic head for perpendicular recording without writing from the lateral sides of a main pole and without erasing data on adjacent tracks. A magnetic disk storage apparatus using the magnetic head. The lateral side of the main pole of a magnetic head for perpendicular recording may have an inver ...


3
Hisashi Takano, Yasutaka Nishida, Tomohiro Okada, Masafumi Michizuki: Single pole type recording head with trailing side tapered edges. Hitachi Global Storage Technologies Japan, Reed Smith, Stanley P Fisher Esq, Juan Carlos A Marquez Esq, November 7, 2006: US07133252 (35 worldwide citation)

A magnetic head for perpendicular recording without writing from the lateral sides of a main pole and without erasing data on adjacent tracks. A magnetic disk storage apparatus using the magnetic head. The lateral side of the main pole of a magnetic head for perpendicular recording may have an inver ...


4
Tomohiro Okada, Yasutaka Nishida, Masafumi Michizuki, Hisashi Takano: Single pole type recording head with tapered edges. Hitachi, Reed Smith, Stanley P Fisher Esq, Juan Carlos A Marquez Esq, February 28, 2006: US07006326 (34 worldwide citation)

A magnetic head for perpendicular recording without writing from the lateral sides of a mains pole and without erasing data on adjacent tracks. A magnetic disk storage apparatus using the magnetic head. The lateral side of the main pole of a magnetic head for perpendicular recording may have an inve ...


5
Takehiko Hamaguchi, Atsushi Nakamura, Yasutaka Nishida, Hisashi Takano, Yohji Maruyama, Hiroshi Ide, Hideki Sawaguchi, Futoshi Tomiyama: Magnetic disk drive. Hitachi Global Storage Technologies Japan, Kenyon & Kenyon, October 28, 2008: US07443625 (20 worldwide citation)

In the present invention, by making the width of the write element larger than the track pitch and securing a write magnetic field strong enough to reverse the magnetization of the magnetic layer, and further by writing while shifting a write head comprising the write element, a magnetic disk drive, ...


6
Yasutaka Nishida, John J Valdes: Three point release buckle assembly. YKK Corporation of America, Kramer & Amado P C, February 3, 2004: US06684466 (20 worldwide citation)

A safety buckle assembly including a male member and a female member that interlockingly and releasably engages the male member. The buckle male member is disengaged from the female member by squeezing the side latches towards each other, to disengage the same from the side catches, while simultaneo ...


7
Yasutaka Nishida, Naoki Satoh: Compensating circuit, equalizer and magnetic recording/reproducing apparatus using the same. Hitachi, Kenyon & Kenyon, October 31, 2000: US06141167 (15 worldwide citation)

A compensating circuit for compensating positive-negative asymmetry of an input signal having an amplitude exhibiting a positive-negative asymmetry with reference to a given level. Either one of the input signal or a signal obtained by multiplying the input signal by a given number is selected to be ...


8
Hiroshi Ide, Futoshi Tomiyama, Yasutaka Nishida, Takehiko Hamaguchi, Hisashi Takano, Yohji Maruyama, Atsushi Nakamura, Hideki Sawaguchi: Adjacent track position detectable information storage apparatus. Hitachi, Kenyon & Kenyon, December 4, 2001: US06327112 (15 worldwide citation)

An information storage apparatus has a disk medium setting data recording areas along a plurality of tracks concentrically arranged, a head for recording and reproducing data on tracks of the disk medium, an actuator for moving the head to a desired track among the plurality of tracks. Also included ...


9
Ryoichiro Uehara, Kayo Fujimoto, Yasutaka Nishida: Buckle. YKK Corporation, Everest Intellectual Property Law Group, Michael S Leonard, August 29, 2006: US07096545 (14 worldwide citation)

A buckle includes a socket (10), a plug (20) of which tip end part can be inserted into and released from the socket by pressing both sides of the socket by a manual operation. The plug has a base (21) located on a base end of the plug, a pair of lock arms (22) extending to the tip end of the plug f ...


10
Yasutaka Nishida, Takehiko Hamaguchi, Hisashi Takano, Hiroshi Ide, Hideki Sawaguchi, Futoshi Tomiyama: Method of controlling read write operation of a magnetic disk apparatus. Hitachi, Kenyon & Kenyon, December 2, 2003: US06657805 (14 worldwide citation)

When the amount of position error PE of a magnetic head meets the condition of Ewf>PE>=Eww for two threshold values Ewf and Eww meeting Ewf>Eww, the track is registered in the track information table as a track requiring rewrite and the tracks on both sides neighboring to the track are tempor ...