Patents by Inventor Hidetsugu Tanaka
Hidetsugu Tanaka has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11805862Abstract: A button assembly that includes a button and a removable screw is provided. A method of attaching a button to a garment is provided. The method includes a step of placing a portion of the garment between the button and a removable screw, a step of penetrating the portion of the garment with the removable screw such that the removable screw is engaged with the garment, and a step of engaging the removable screw with the button.Type: GrantFiled: April 7, 2021Date of Patent: November 7, 2023Assignee: YKK CorporationInventors: Chuck G. LeCompte, Jonathan H. Sharp, Hidetsugu Tanaka
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Publication number: 20220257090Abstract: An insertion device includes a bending portion provided in an insertion portion having a longitudinal axis; an operation lever provided in an operation portion and configured to cause the bending portion to bend, where the operation portion is provided on a proximal end side of the insertion portion; and an elastic member connected to the operation portion, and provided with rigidity that resists tilting when the operation lever is tilted, where first rigidity in a first tilting direction is lower than second rigidity in a second tilting direction, wherein of the elastic member, a cross-section orthogonal to an axial direction of the operation lever is formed into a rectangular shape, and any of corners of the rectangular shape of the cross-section is placed in the first tilting direction.Type: ApplicationFiled: April 27, 2022Publication date: August 18, 2022Applicant: OLYMPUS CORPORATIONInventors: Yuta SEKIGUCHI, Natsuki HORI, Hidetsugu TANAKA
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Publication number: 20220240753Abstract: An insertion instrument includes: an insertion portion including a bending portion; an operation portion; one operation lever provided to the operation portion, the operation lever being configured to tilt, to cause the bending portion to bend in a predetermined direction; a movable member provided around the operation lever and configured to move according to tilting of the operation lever; and at least one indicator configured to change according to a movement of the movable member, the at least one indicator being visually recognizable.Type: ApplicationFiled: April 20, 2022Publication date: August 4, 2022Applicant: OLYMPUS CORPORATIONInventors: Natsuki HORI, Hidetsugu TANAKA, Ryuhei FUJIMOTO
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Publication number: 20210315325Abstract: A button assembly that includes a button and a removable screw is provided. A method of attaching a button to a garment is provided. The method includes a step of placing a portion of the garment between the button and a removable screw, a step of penetrating the portion of the garment with the removable screw such that the removable screw is engaged with the garment, and a step of engaging the removable screw with the button.Type: ApplicationFiled: April 7, 2021Publication date: October 14, 2021Inventors: Chuck G. LeCompte, Jonathan H. Sharp, Hidetsugu Tanaka
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Patent number: 8338557Abstract: Olefin polymer with narrow molecular weight distribution and specific molecular weight, olefin polymer having functional group introduced at terminal, tapered polymer containing segment wherein monomer composition continuously changes in the polymer chain, olefin polymer having different segments bonded to each other, and process for preparing these polymers. The olefin polymers are polymers of C2-20 carbon atom olefins and have a number-average molecular weight of ?500 and Mw/Mn of ?1.5. In syntheses, an olefin of 2-20 carbon atoms is polymerized in the presence of a catalyst comprising a transition metal compound represented by the formula LmMXn wherein M is a transition metal atom of Group 3-11, m is 1-5, n is a number satisfying a valence of M, L is a ligand—coordinated to the central metal M—which contains a heteroatom having no direct bond to the central metal, and X is e.g. halogen or a hydrocarbon.Type: GrantFiled: December 1, 2008Date of Patent: December 25, 2012Assignee: Mitsui Chemicals, Inc.Inventors: Makoto Mitani, Yasunori Yoshida, Junichi Mohri, Kazutaka Tsuru, Seiichi Ishii, Shinichi Kojoh, Tomoaki Matsugi, Junji Saito, Naoto Matsukawa, Shigekazu Matsui, Takashi Nakano, Hidetsugu Tanaka, Norio Kashiwa, Terunori Fujita
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Patent number: 7808741Abstract: Embodiments of the present invention help to adjust the recess depth of a head element portion of a head slider. In an embodiment of the present invention, in a test step in manufacturing an HDD, the HDD examines the recess depth of a head element portion and decreases and adjusts the recess depth if the recess depth of the head element portion does not satisfy the predetermined condition. The HDD moves an actuator to a ramp of a retract position and supplies power to a heater in a head slider. If the heater power is large, the head element portion undergoes plastic deformation. The plastic deformation of the head element portion decreases the recess depth of the head element portion.Type: GrantFiled: November 21, 2008Date of Patent: October 5, 2010Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Tsuyoshi Matsumoto, Futoshi Kitaizumi, Yoshio Yamamoto, Hidetsugu Tanaka, Masayuki Ishikawa
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Patent number: 7566761Abstract: The present invention provides an olefin polymer having a narrow molecular weight distribution and a specific molecular weight, an olefin polymer having a functional group introduced at the terminal, a tapered polymer containing a segment wherein monomer composition continuously changes in the polymer chain, an olefin polymer having different segments which are bonded to each other, and a process for preparing these polymers. The olefin polymers of the invention are polymers of olefins of 2 to 20 carbon atoms and have a number-average molecular weight of not less than 500 and Mw/Mn of not more than 1.5.Type: GrantFiled: September 29, 2004Date of Patent: July 28, 2009Assignee: Mitsui Chemicals, Inc.Inventors: Makoto Mitani, Yasunori Yoshida, Junichi Mohri, Kazutaka Tsuru, Seiichi Ishii, Shinichi Kojoh, Tomoaki Matsugi, Junji Saito, Naoto Matsukawa, Shigekazu Matsui, Takashi Nakano, Hidetsugu Tanaka, Norio Kashiwa, Terunori Fujita
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Publication number: 20090168248Abstract: Embodiments of the present invention help to adjust the recess depth of a head element portion of a head slider. In an embodiment of the present invention, in a test step in manufacturing an HDD, the HDD examines the recess depth of a head element portion and decreases and adjusts the recess depth if the recess depth of the head element portion does not satisfy the predetermined condition. The HDD moves an actuator to a ramp of a retract position and supplies power to a heater in a head slider. If the heater power is large, the head element portion undergoes plastic deformation. The plastic deformation of the head element portion decreases the recess depth of the head element portion.Type: ApplicationFiled: November 21, 2008Publication date: July 2, 2009Inventors: Tsuyoshi Matsumoto, Futoshi Kitaizumi, Yoshio Yamamoto, Hidetsugu Tanaka, Masayuki Ishikawa
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Publication number: 20090141391Abstract: Embodiments of the present invention help to precisely control the clearance between a head and disk for the pressure without using a barometric sensor. In an embodiment of the present invention, an HDD determines a clearance from variations in operational parameters, and further determines a variation in pressure by deducting the clearance variation caused by a variation in temperature from the clearance. When the HDD controls the clearance in accordance with the pressure change, the HDD checks for head-disk contact. The accuracy and reliability in pressure measurement (clearance measurement) using operational parameters are not high. Therefore, confirming the pressure measurement by the presence or absence of head-disk contact eliminates head-disk contact in the following read/write operation to attain a securer margin for the clearance.Type: ApplicationFiled: October 30, 2008Publication date: June 4, 2009Inventors: Kenichi Kuramoto, Masayuki Kurita, Yoshihiko Maeda, Hidetsugu Tanaka, Akihiro Sera, Katsumasa Yamazaki
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Publication number: 20090118426Abstract: The present invention provides an olefin polymer having a narrow molecular weight distribution and a specific molecular weight, an olefin polymer having a functional group introduced at the terminal, a tapered polymer containing a segment wherein monomer composition continuously changes in the polymer chain, an olefin polymer having different segments which are bonded to each other, and a process for preparing these polymers. The olefin polymers of the invention are polymers of olefins of 2 to 20 carbon atoms and have a number-average molecular weight of not less than 500 and Mw/Mn of not more than 1.5.Type: ApplicationFiled: December 1, 2008Publication date: May 7, 2009Inventors: Makoto MITANI, Yasunori YOSHIDA, Junichi MOHRI, Kazutaka TSURU, Seiichi ISHII, Shinichi KOJOH, Tomoaki MATSUGI, Junji SAITO, Naoto MATSUKAWA, Shigekazu MATSUI, Takashi NAKANO, Hidetsugu TANAKA, Norio KASHIWA, Terunori FUJITA
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Patent number: 7280306Abstract: Embodiments of the invention provide a manufacturing method for a disk drive which allows highly accurate recording of servo data without substituting the internal gas of the disk drive, and such a magnetic disk drive and servo track writer. In one embodiment, a disk, a magnetic head slider with a head for writing data onto and reading out data from the disk, a suspension for retaining the magnetic head slider, an arm for supporting the suspension, and a driving section for driving the arm are stored into an enclosure. When a servo track write operation is conducted, the enclosure interior is depressurized to an atmospheric pressure lower than normal pressure and then servo data is recorded on the disk.Type: GrantFiled: January 25, 2006Date of Patent: October 9, 2007Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Hidetsugu Tanaka, Tsuyoshi Matsumoto, Atsushi Tatsugawa, Tatsushi Aoki
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Publication number: 20060164752Abstract: Embodiments of the invention provide a manufacturing method for a disk drive which allows highly accurate recording of servo data without substituting the internal gas of the disk drive, and such a magnetic disk drive and servo track writer. In one embodiment, a disk, a magnetic head slider with a head for writing data onto and reading out data from the disk, a suspension for retaining the magnetic head slider, an arm for supporting the suspension, and a driving section for driving the arm are stored into an enclosure. When a servo track write operation is conducted, the enclosure interior is depressurized to an atmospheric pressure lower than normal pressure and then servo data is recorded on the disk.Type: ApplicationFiled: January 25, 2006Publication date: July 27, 2006Applicant: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Hidetsugu Tanaka, Tsuyoshi Matsumoto, Atsushi Tatsugawa, Tatsushi Aoki
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Patent number: 6927941Abstract: A disk storage medium and a disk drive which reduce friction during landing of the head/slider is described. The minimum fly height area of the head/slider is positioned over a texture free portion of the landing zone on the disk surface landing. In a preferred embodiment, the landing zone of a magnetic disk is a laser texture zone comprising a great number of bumps and is positioned during landing adjacent an area other than the minimum fly height area of the head/slider. The area facing the minimum fly height area of a head/slider has no bumps, i.e. is a bump free zone.Type: GrantFiled: March 27, 1998Date of Patent: August 9, 2005Assignee: Hitachi Global Storage Technologies Netherlands BVInventors: Hidetsugu Tanaka, Yoshio Yamamoto, Yoshinao Harada, Takao Chikazawa
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Publication number: 20050065302Abstract: The present invention provides an olefin polymer having a narrow molecular weight distribution and a specific molecular weight, an olefin polymer having a functional group introduced at the terminal, a tapered polymer containing a segment wherein monomer composition continuously changes in the polymer chain, an olefin polymer having different segments which are bonded to each other, and a process for preparing these polymers. The olefin polymers of the invention are polymers of olefins of 2 to 20 carbon atoms and have a number-average molecular weight of not less than 500 and Mw/Mn of not more than 1.5.Type: ApplicationFiled: September 29, 2004Publication date: March 24, 2005Inventors: Makoto Mitani, Yasunori Yoshida, Junichi Mohri, Kazutaka Tsuru, Seiichi Ishii, Shinichi Kojoh, Tomoaki Matsugi, Junji Saito, Naoto Matsukawa, Shigekazu Matsui, Takashi Nakano, Hidetsugu Tanaka, Norio Kashiwa, Terunori Fujita
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Patent number: 6838540Abstract: The present invention provides an olefin polymer having a narrow molecular weight distribution and a specific molecular weight, an olefin polymer having a functional group introduced at the terminal, a tapered polymer containing a segment wherein monomer composition continuously changes in the polymer chain, an olefin polymer having different segments which are bonded to each other, and a process for preparing these polymers. The olefin polymers of the invention are polymers of olefins of 2 to 20 carbon atoms and have a number-average molecular weight of not less than 500 and Mw/Mn of not more than 1.5.Type: GrantFiled: January 26, 2001Date of Patent: January 4, 2005Assignee: Mitsui Chemicals, Inc.Inventors: Makoto Mitani, Yasunori Yoshida, Junichi Mohri, Kazutaka Tsuru, Seiichi Ishii, Shinichi Kojoh, Tomoaki Matsugi, Junji Saito, Naoto Matsukawa, Shigekazu Matsui, Takashi Nakano, Hidetsugu Tanaka, Norio Kashiwa, Terunori Fujita
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Publication number: 20030114623Abstract: The present invention provides an olefin polymer having a narrow molecular weight distribution and a specific molecular weight, an olefin polymer having a functional group introduced at the terminal, a tapered polymer containing a segment wherein monomer composition continuously changes in the polymer chain, an olefin polymer having different segments which are bonded to each other, and a process for preparing these polymers. The olefin polymers of the invention are polymers of olefins of 2 to 20 carbon atoms and have a number-average molecular weight of not less than 500 and Mw/Mn of not more than 1.5.Type: ApplicationFiled: September 26, 2001Publication date: June 19, 2003Inventors: Makoto Mitani, Yasunori Yoshida, Junichi Mohri, Kazutaka Tsuru, Seiichi Ishii, Shinichi Kojoh, Tomoaki Matsugi, Junji Saito, Naoto Matsukawa, Shigekazu Matsui, Takashi Nakano, Hidetsugu Tanaka, Norio Kashiwa, Terunori Fujita
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Patent number: 6421202Abstract: At least part of the surface of a read/write element of the magnetic head surface is coated with low surface energy materials. The low surface energy materials have sufficient humidity resistance, wetting resistance, and hydrophobicity to repel water from the coated surfaces. Such properties yield improved corrosion resistance for the coated surfaces. The low surface energy materials include fluorocarbon compounds (FCOC) and special materials such as perfluoroalkylpolyoxyethyleneethanol. The low surface energy materials are coated on the magnetic heads as thin films. The thin films have a thickness in the range of 5-100 angstroms, but are preferred in the range of 10-20 angstroms. The thin films provide sufficient adhesion on and corrosion protection of the heads without decreasing their performance.Type: GrantFiled: May 16, 2000Date of Patent: July 16, 2002Assignee: International Business Machines CorporationInventors: Hidetsugu Tanaka, Masayuki Kanamaru, Masahiro Nagayoshi
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Patent number: 6399724Abstract: The present invention is intended to provide an olefin polymerization catalyst comprising a novel transition metal compound and having an excellent olefin polymerization activity and to provide a process for olefin polymerization.Type: GrantFiled: December 3, 1999Date of Patent: June 4, 2002Assignee: Mitsui Chemicals, Inc.Inventors: Shigekazu Matsui, Masatoshi Nitabaru, Kazutaka Tsuru, Terunori Fujita, Yasuhiko Suzuki, Yukihiro Takagi, Hidetsugu Tanaka
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Patent number: 6292323Abstract: A method for removing accumulated particles that have adhered to a head for reading/writing data to a rotation disk type recording medium in an information recording and reproducing apparatus. First a disk read/write operation is stopped. A vibration amplitude is then selected. The head repeatedly performs a seek operation with the selected amplitude so as to vibrate the head. A new vibration amplitude is then selected, and the head repeatedly performs seek operations with the new amplitude. The vibration amplitude is gradually changed so that the head performs seek operations over a range of amplitudes, thereby removing accumulated particles that have adhered to the head.Type: GrantFiled: January 12, 1999Date of Patent: September 18, 2001Assignee: International Business Machines CorporationInventors: Hidetsugu Tanaka, Yoshinao Harada, Masahiko Sato, Takumi Satoh
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Patent number: 4224252Abstract: Disclosed are improved procedures for preparing pinacolone from compounds of general formula (I) ##STR1## wherein, either adjacent two of A, B, C and D form a single bond between them and the remaining two are hydrogen atoms, or both A and D are hydrogen atoms and one of B and C is a hydrogen atom and the other represents OH, Cl, Br, HSO.sub.4, H.sub.2 PO.sub.4 or ClO.sub.4, anda new procedure which enables preparing pinacolone from a compound of general formula (II) ##STR2## wherein, both W and Y are each hydrogen atoms and X and Z are the same or different and each represents OH, Cl, Br, HSO.sub.4, H.sub.2 PO.sub.4, ClO.sub.4 or RCOO wherein R is a hydrogen atom or an alkyl group of 1 to 3 carbon atoms, or one of W and Y is a hydrogen atom and the other forms a single bond together with X, and Z represents OH, Cl, Br, HSO.sub.4 H.sub.2 PO.sub.4, ClO.sub.4 or RCOO where R is defined as above.Type: GrantFiled: May 15, 1979Date of Patent: September 23, 1980Assignee: Kuraray Co., Ltd.Inventors: Sunao Kyo, Haruo Tsuchiya, Hidetsugu Tanaka
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Patent number: 5220471Abstract: A thin film magnetic head comprises a slider and a reading/writing element attached to an end surface of the slider, wherein the reading/writing element is disposed at an end surface in the longitudinal direction of the slider when the longitudinal direction and the width direction are determined on the surface which faces a magnetic recording medium, of the slider, and the slider has a linear groove in the surface opposite the surface which faces the magnetic recording medium, at the intermediate portion in the width direction of the slider and along the longitudinal direction.Type: GrantFiled: June 26, 1992Date of Patent: June 15, 1993Assignee: TDK CorporationInventor: Mikio Matsuzaki