Patents by Inventor Hiroyuki Chiba

Hiroyuki Chiba 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).

  • Patent number: 7165574
    Abstract: A valve device including a valve chamber having an inlet port at one end and a valve seat at the other end; a valve housing containing the valve chamber; the valve chamber accommodating a spherical valve element which performs opening and closing operation to the valve seat, and a valve spring which urges the valve element in a closing direction; and a push rod which penetrates a center hole of the valve seat and pushes the valve element in an opening direction. A cylindrical valve guide member is fit into the valve chamber, the cylindrical valve guide member including a plurality of guide projections on an inner peripheral surface to guide opening and closing operation of the valve element. Grooves between the plurality of guide projections serve as passages providing communication between the inlet port and the valve seat.
    Type: Grant
    Filed: August 27, 2004
    Date of Patent: January 23, 2007
    Assignee: Keihin Corporation
    Inventors: Shigeto Ryuen, Hiroyuki Chiba, Masamichi Kagawa, Akira Nagasaki
  • Publication number: 20060245678
    Abstract: A shielding plate for controlling the entry of oil between an inner ring and an outer ring is provided in the vicinity of an opening between the inner ring and the outer ring which lies a side where oil enters. In addition, a fluid accommodating plate for accommodating therein oil is provided in the vicinity of an opening between the outer ring and the inner ring which lies on a side where oil exits.
    Type: Application
    Filed: April 27, 2006
    Publication date: November 2, 2006
    Applicant: JTEKT CORPORATION
    Inventors: Hiroyuki Chiba, Hiroki Matsuyama, Kazutoshi Toda
  • Publication number: 20060235225
    Abstract: Crystals of 5-[2-amino-4-(2-furyl)pyrimidin-5-yl]-1-methylpyridin-2(1H)-one having a diffraction peak at a diffraction angle (2?±0.2°) of 12.8°, 18.1° and/or 23.5° in a powder X-ray diffraction are excellent in stability against light, therefore are suitable for an active ingredient of a preventing and therapeutic agent for diseases such as constipation.
    Type: Application
    Filed: March 20, 2006
    Publication date: October 19, 2006
    Applicant: Eisai Co., Ltd.
    Inventors: Hitoshi Harada, Hiroshi Ishihara, Yoshiaki Sato, Hiroyuki Chiba, Teiji Takigawa
  • Patent number: 7084268
    Abstract: The present invention provides carbapenem hydrochloride trihydrate crystals, which are chemically stable, easily purified and useful as antimicrobial agents, a process for producing them, and a powdery charged preparation for injection containing them. That is, it provides carbapenem hydrochloride trihydrate crystals having a powdery X-ray diffraction pattern containing lattice distances (d) of 9.0, 4.1 and 2.8 ?, a process for producing them, and a powdery charged preparation for injection containing them.
    Type: Grant
    Filed: June 5, 2000
    Date of Patent: August 1, 2006
    Assignee: Eisai Co., Ltd.
    Inventors: Hiroyuki Chiba, Masahiko Tsujii, Astsushi Koiwa, Shin Sakurai, Akio Kayano, Hiroyuki Ishizuka, Hiroyuki Saito, Taiju Nakamura, Ikuo Kushida, Yasuyuki Suzuki, Takako Yoshiba, Kazuhide Ashizawa, Masahiro Sakurai, Eiichi Yamamoto
  • Patent number: 7072137
    Abstract: An HDC asserts the read gate of an RDC when a read head is positioned in a sector located before a sector that a hot system instructs to read data when seen from the rotation direction of a storage medium. The data that the read head has read from the sector is used to adapt a circuit that constitutes the RDC. However, the data is not transferred to the host system. Such a process is repeated until the read head reaches a position where data stored in a sector whose data has been instructed to read can be read. In this way, time needed to adapt a circuit that constitutes a read channel can be shortened.
    Type: Grant
    Filed: June 10, 2003
    Date of Patent: July 4, 2006
    Assignee: Fujitsu Limited
    Inventor: Hiroyuki Chiba
  • Publication number: 20060092755
    Abstract: There is provided a semiconductor test apparatus including: a first waveform generating means that generates a common pattern waveform corresponding to common information common to each of a plurality of semiconductor devices; a plurality of second waveform generating means that generates individual pattern waveforms corresponding to a plurality of individual information individually prepared in response to each of the plurality of semiconductor devices; and a waveform switching unit that selectively performs an operation of inputting the common pattern waveform generated from the first waveform generating means in common and an operation of inputting the individual pattern waveforms respectively generated from the plurality of second waveform generating means individually, into each of the plurality of semiconductor devices.
    Type: Application
    Filed: December 16, 2005
    Publication date: May 4, 2006
    Applicant: Advantest Corporation
    Inventors: Kazuhiko Sato, Sae-Bum Myung, Hiroyuki Chiba
  • Publication number: 20060040916
    Abstract: The present invention provides carbapenem hydrochloride trihydrate crystals, which are chemically stable, easily purified and useful as antimicrobial agents, a process for producing them, and a powdery charged preparation for injection containing them. That is, it provides carbapenem hydrochloride trihydrate crystals having a powdery X-ray diffraction pattern containing lattice distances (d) of 9.0, 4.1 and 2.8 ?, a process for producing them, and a powdery charged preparation for injection containing them.
    Type: Application
    Filed: October 26, 2005
    Publication date: February 23, 2006
    Inventors: Hiroyuki Chiba, Masahiko Tsujii, Astsushi Koiwa, Shin Sakurai, Akio Kayano, Hiroyuki Ishizuka, Hiroyuki Saito, Taiju Nakamura, Ikuo Kushida, Yasuyuki Suzuki, Takako Yoshiba, Kazuhide Ashizawa, Masahiro Sakurai, Eiichi Yamamoto
  • Publication number: 20050201650
    Abstract: An end faced on an outer side in a radial direction of a small diameter annular portion of a retainer is disposed on an inner side in a radial direction of a pitch conical face of a taper roller and an end face on an inner side in a radial direction of a large diameter annular portion is disposed on an outer side in the radial direction of the pitch conical face. Further, a portion of the small diameter annular portion opposed to a small diameter end face of the taper roller is disposed on the inner side in the radial direction of the pitch conical face and a portion of the large diameter annular portion opposed to a large diameter end face of the taper roller is disposed on the outer side in the radial direction of the pitch conical face.
    Type: Application
    Filed: March 14, 2005
    Publication date: September 15, 2005
    Applicant: Koyo Seiko Co., Ltd.
    Inventors: Hiroki Matsuyama, Hiroyuki Chiba, Masahiro Harada, Kazutoshi Toda, Kiyoshi Ogino, Koji Kawaguchi, Yuzuru Takahashi, Hirofumi Dodoro
  • Publication number: 20050067028
    Abstract: A valve device comprises: a valve chamber having an inlet port at one end and a valve seat at the other end; a valve housing containing the valve chamber; the valve chamber accommodating a spherical valve element which performs opening and closing operation to the valve seat, and a valve spring which urges the valve element in a closing direction; and a push rod which penetrates a center hole of the valve seat and pushes the valve element in an opening direction. A cylindrical valve guide member is fit into the valve chamber, the cylindrical valve guide member including a plurality of guide projections on an inner peripheral surface to guide opening and closing operation of the valve element. Grooves between the plurality of guide projections serve as passages providing communication between the inlet port and the valve seat.
    Type: Application
    Filed: August 27, 2004
    Publication date: March 31, 2005
    Inventors: Shigeto Ryuen, Hiroyuki Chiba, Masamichi Kagawa, Akira Nagasaki
  • Publication number: 20040236118
    Abstract: The object of the invention is to provide a process for efficient, inexpensive and stereoselective production of (2S,4S)-2-[[(3R)-pyrrolidin-3-yl-(R)-hydroxylmethyl]pyrrolidin-4-thiol dihydrochloride useful as an intermediate in production of novel carbapenem, and the intermediate is produced via a novel crystallizable intermediate (2S,4R)—N-t-butoxycarbonyl-2-[[(3R)—N-t-butoxycarbonyl pyrrolidin-3-yl-(R)-hydroxylmethyl]-4-hydroxypyrrolidine from a (2S,4R)-4-alkylsilyloxy-N-t-butoxycarbonylpyridine-2-carbaldehyde derivative by aldol reaction using an asymmetric assistant such as amino-alcohol.
    Type: Application
    Filed: April 9, 2004
    Publication date: November 25, 2004
    Inventors: Katsuya Tagami, Hiroyuki Chiba, Taiju Nakamura, Manabu Kubota, Makoto Matsui, Akio Kayano, Mamoru Miyazawa, Taichi Abe
  • Publication number: 20040100561
    Abstract: An image capturing apparatus or digital camera in which an image of a subject formed by lenses (L1 and L2), and a low pass filter (F), in a photographic optical system is inputted by an imaging device unit (IS), an A/D converter (11, 111 or 211) and an image processing unit (12, 112 or 212), in an imaging device, comprises the a blur detecting part (16) and a blur detecting unit (17) in a blur-detecting device (SD), a compensating unit (BU) and a blur-compensation driving unit (20, 120 or 220) in a blur compensating device, a blur-compensation controlling device or system controller (15) for computing a displaced amount for compensation in a blur compensating device from an output of the blur detecting device and driving the blur compensating device, a device or the system controller (15) and a memory group (19) for calibrating a conversion coefficient for converting the output of the blur detecting device into the displaced amount, and a device for executing a calibrating operation, or the system controller
    Type: Application
    Filed: August 15, 2003
    Publication date: May 27, 2004
    Inventors: Junichi Shinohara, Kunihisa Yamaguchi, Naoki Koshida, Keiichiroh Hirahara, Hiroyuki Chiba
  • Publication number: 20030235098
    Abstract: An HDC asserts the read gate of an RDC when a read head is positioned in a sector located before a sector that a hot system instructs to read data when seen from the rotation direction of a storage medium. The data that the read head has read from the sector is used to adapt a circuit that constitutes the RDC. However, the data is not transferred to the host system. Such a process is repeated until the read head reaches a position where data stored in a sector whose data has been instructed to read can be read. In this way, time needed to adapt a circuit that constitutes a read channel can be shortened.
    Type: Application
    Filed: June 10, 2003
    Publication date: December 25, 2003
    Applicant: Fujitsu Limited
    Inventor: Hiroyuki Chiba
  • Patent number: 6642377
    Abstract: A production process which comprises subjecting a basic antibiotic.oxalate (II) to salt-exchange with an alkali earth metal salt (III) of an inorganic acid: wherein the ring A means the basic antibiotic; R10 means a protected functional group used in organic synthesis; Ak—E means the alkali earth metal; and B means the inorganic acid, respectively.
    Type: Grant
    Filed: January 14, 2002
    Date of Patent: November 4, 2003
    Assignee: Eisai Co., Ltd.
    Inventors: Akio Kayano, Hiroyuki Chiba, Taiju Nakamura, Shin Sakurai, Hiroyuki Ishizuka, Hiroyuki Saito, Yuuki Komatsu, Manabu Sasho, Nobuaki Sato, Shigeto Negi
  • Publication number: 20030191936
    Abstract: An access control method used in a client connected to a server. The method manages a certification authority certificate used to judge whether the server has right to access the client. The certification authority certificate is made into a usable state under a predetermined condition. When accessing the server, the client receives a certificate specifying the server transmitted from the server. When a certification authority certificate corresponding to the certificate specifying the server exists in a usable state, access to the server is enables in accordance with a comparison result.
    Type: Application
    Filed: August 14, 2002
    Publication date: October 9, 2003
    Inventors: Yoshiaki Kawatsura, Hiroyuki Chiba, Kiyoshi Watanabe, Akira Morita
  • Publication number: 20020157006
    Abstract: Generalized, low-cost, and easy digital signature verification techniques for use in information processing operations that require a plurality of digital signatures and series of information processing operations that require a plurality of digital signatures based on the progression of operations. Techniques are provided for verifying signatures on an information processing request, received via a network from a processing application computer, to which multiple digital signatures are to be affixed.
    Type: Application
    Filed: April 16, 2002
    Publication date: October 24, 2002
    Applicant: Hitachi, Ltd.
    Inventors: Yoshitaka Narishima, Hiroyuki Chiba, Shoichi Nakagami
  • Publication number: 20020069129
    Abstract: Techniques that allow trust evaluation institutions to share trust information of members (users) belonging to different trust evaluation institutions. A member registered at one trust evaluation institution can carry out a transaction with a member registered at another trust evaluation institution even if the trust evaluation institutions use different techniques, methods, procedures, or standards for evaluating trust information for their members.
    Type: Application
    Filed: September 13, 2001
    Publication date: June 6, 2002
    Inventors: Takeshi Akutsu, Hiroyuki Chiba, Akira Morita, Kiyoshi Watanabe, Satoshi Takemoto, Yoshitaka Narishima, Yoshiaki Kawatsura
  • Publication number: 20020046189
    Abstract: The present invention provides a payment method that balances reliability, security, and speed of payments, a system for the same, and a recording medium storing a program for the same. In one embodiment, a financial institution such as a credit company, a bank, or the like determines whether or not a payment request from a buyer is valid using billing information from the merchant involved in the payment and authentication information from the buyer. Then, if the billing information sent from the merchant does not match the ordering information extracted from the authentication information, the payment request is rejected.
    Type: Application
    Filed: July 5, 2001
    Publication date: April 18, 2002
    Applicant: Hitachi, Ltd.
    Inventors: Akira Morita, Hiroyuki Chiba, Takeshi Akutsu, Satoshi Takemoto, Yoshitaka Narishima, Yoshiaki Kawatsura, Kiyoshi Watanabe
  • Patent number: 6356293
    Abstract: A printer of the present invention includes at least a first and a second drum unit each including a respective print drum. Angular position sensing device each are assigned to the respective print drum. A main motor included in drum drive mechanism is controlled on the basis of the output of a first or a second drum unlock key such that the print drum of the first or second drum unit is brought to a preselected home position. The printer has a compact configuration and promotes easy, efficient manipulation without resorting to conventional top-bottom movement adjustment mechanism including top-bottom moving device.
    Type: Grant
    Filed: June 30, 2000
    Date of Patent: March 12, 2002
    Assignee: Tohoku Ricoh Co., Ltd.
    Inventor: Hiroyuki Chiba
  • Publication number: 20020018566
    Abstract: Recipient machine sends a contents request message with recipient's public key to entitlement granter machine. On the entitlement granter machine, digital rights data relevant to the contents request is encrypted with the recipient's public key. Encrypted digital rights data with the entitlement granter's digital signature thereon is returned to recipient machine. On the recipient machine, encrypted digital rights data is decrypted with the recipient's secret key. The recipient machine sends a message containing digital rights data thus decrypted, recipient's public key, and the above encrypted data to contents distributor machine.
    Type: Application
    Filed: February 13, 2001
    Publication date: February 14, 2002
    Applicant: Hitachi, Ltd.
    Inventors: Yoshiaki Kawatsura, Hiroyuki Chiba, Kiyoshi Watanabe, Akira Morita, Tomochika Tomiyama, Takeshi Akutsu
  • Patent number: 5867656
    Abstract: In a computer system in which nodes are connected to each other via a network, transmission and reception buffers of sender and receiver processes are prepared as resident areas in a main storage. A node of a receiver side notifies, prior to initiation of a communication, a physical address of a data reception area of the node to a node on a sender side. In the node on the sender side, the reported physical address is added to transmission data to transfer a resultant item. On the receiver side, reception data is written in a location of the main storage at the physical address. In the receiver node, the double buffering is employed to prevent an overwriting operation of another node onto the data reception area. The respective nodes achieve partial synchronization with adjacent nodes in chain, thereby automatically establishing synchronization between all nodes.
    Type: Grant
    Filed: December 3, 1996
    Date of Patent: February 2, 1999
    Assignee: Hitachi, Ltd.
    Inventors: Masaaki Iwasaki, Hiroyuki Chiba, Naoki Utsunomiya, Kouji Sonoda, Satoshi Yoshizawa, Masahiko Yamauchi