Patents by Inventor Takahiko Mitani

Takahiko Mitani 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).

  • Publication number: 20230418045
    Abstract: An endoscope imaging unit includes: an objective lens including a first lens and a second lens; an imaging element configured to capture an image formed by the objective lens; a first lens frame configured to hold the first lens, the first lens frame including a lens barrel that holds the first lens and a flange portion that extends outward from an outer peripheral portion of the lens barrel; a second lens frame that is fixed to the first lens frame and holds the second lens; and a holder that accommodates at least part of the first lens frame and the second lens frame therein and holds the outer peripheral surface of the flange portion of the first lens frame; wherein the flange portion is fixed to the holder on a side surface thereof in an extending direction.
    Type: Application
    Filed: September 7, 2023
    Publication date: December 28, 2023
    Applicant: OLYMPUS CORPORATION
    Inventors: Koichi Shiotani, Takahiko Mitani, Yuki Nakayama
  • Publication number: 20210330617
    Abstract: A method for stabilizing a sanshool compound is provided. The method for stabilizing a sanshool compound comprises a mixing step in which the sanshool compound is mixed with an antioxidant in a liquid, the liquid comprising water and/or a water-soluble organic solvent and the mixing step being conducted under the conditions of a pH of 6 or higher.
    Type: Application
    Filed: August 23, 2019
    Publication date: October 28, 2021
    Inventors: Takahiko MITANI, Takashi TSUCHIDA
  • Patent number: 9148554
    Abstract: In this invention, an image pickup unit for endoscope including an image pickup device includes, in an optical black region of the image pickup device, a phase reference pixel region in which a pixel that outputs a signal capable of being used for phase adjustment of the video by receiving light is disposed, and an optical axis of an objective optical system member having an image circle which is narrower than an effective pixel region of the image pickup device is arranged at a position closer to the phase reference pixel region with respect to a center of the effective pixel region such that light transmitted through the objective optical system member can reach the phase reference pixel region.
    Type: Grant
    Filed: October 8, 2013
    Date of Patent: September 29, 2015
    Assignee: OLYMPUS CORPORATION
    Inventors: Tomohisa Kaneko, Takahiko Mitani
  • Patent number: 9007449
    Abstract: An image-capturing apparatus and a repair method thereof are provided. The image-capturing apparatus includes a lens frame to which one or more lenses are fixed; an image-capturing frame to which an image-capturing device is fixed; and a fixing member for fixing the lens frame and the image-capturing frame to each other without adhering a fitted portion between the lens frame and the image-capturing frame. The repair method for the image-capturing apparatus includes destructing a fixing member for fixing to each other a lens frame to which one or more lenses are fixed and an image-capturing frame to which an image-capturing device is fixed, and releasing fixing between the frames; replacing at least either of the lens frame and the image-capturing frame; and fixing to each other the lens frame and the image-capturing frame.
    Type: Grant
    Filed: January 5, 2007
    Date of Patent: April 14, 2015
    Assignees: Olympus Medical Systems Corp., Olympus Corporation
    Inventors: Takahiko Mitani, Kazuhiro Kumei, Kazuyoshi Akiba, Seiji Sakai, Hironobu Ichimura, Masahiro Kawauchi
  • Publication number: 20140078276
    Abstract: In this invention, an image pickup unit for endoscope including an image pickup device includes, in an optical black region of the image pickup device, a phase reference pixel region in which a pixel that outputs a signal capable of being used for phase adjustment of the video by receiving light is disposed, and an optical axis of an objective optical system member having an image circle which is narrower than an effective pixel region of the image pickup device is arranged at a position closer to the phase reference pixel region with respect to a center of the effective pixel region such that light transmitted through the objective optical system member can reach the phase reference pixel region.
    Type: Application
    Filed: October 8, 2013
    Publication date: March 20, 2014
    Applicant: OLYMPUS MEDICAL SYSTEMS CORP.
    Inventors: Tomohisa KANEKO, Takahiko MITANI
  • Patent number: 8427533
    Abstract: An image pickup apparatus of the present invention varies optical properties by moving a part of lenses of an objective lens, and includes a solid-state image pickup device unit that is disposed at a rear-end section and that subjects a subject image to photoelectric conversion, a fixed lens frame that retains the objective lens that is disposed in front of the solid-state image pickup device unit, a movable lens frame that retains the part of lenses that moves along a photographing optical axis O inside the lens frame, and an actuator having one end connected to the movable lens frame and that moves the movable lens frame forward and backward. The actuator includes a rigid member provided so as to extend to the vicinity of the rear end at which the solid-state image pickup device unit is disposed and a shape memory alloy that is coupled to the rigid member.
    Type: Grant
    Filed: December 12, 2008
    Date of Patent: April 23, 2013
    Assignee: Olympus Medical Systems Corp.
    Inventors: Seiji Sakai, Tomoaki Yamashita, Masahiro Kawauchi, Takahiko Mitani, Yuuya Ishida, Seiji Iwasaki
  • Patent number: 8425405
    Abstract: An electronic endoscope apparatus includes: an image pickup apparatus mounted at a distal end portion of an insertion portion; an operation portion provided consecutively at the insertion portion, with a frame member incorporated therein; and an electrical cable extended from the operation portion for connection with an external device. In the electronic endoscope apparatus, the frame member has a circuit board portion which establishes electrical connection between shields of the insertion portion and the electrical cable, and on which various electronic parts for exchanging signals with the image pickup apparatus are mounted. In spite of the arrangement of the image pickup apparatus that can acquire high-quality images at a distal end portion of the insertion portion, a size of the apparatus, in particular, a diameter of the insertion portion, can be prevented from being increased.
    Type: Grant
    Filed: April 29, 2009
    Date of Patent: April 23, 2013
    Assignee: Olympus Medical Systems Corp.
    Inventors: Takahiko Mitani, Akira Muramatsu, Seiji Sakai, Tomoaki Yamashita, Masahiro Kawauchi, Yuichi Wataya
  • Publication number: 20120292079
    Abstract: A composite cable formed by unitizing coaxial wires of a drive signal system by twisting and bundling, and a composite cable formed by unitizing coaxial wires of an output signal system by twisting and bundling are arranged so as to be positioned substantially on a straight line passing through a cable center axis, and other electric wires of a power supply system are arranged at positions that are substantially symmetrical to each other with respect to the straight line passing through the cable center axis. Then, the composite cables and the simple wires are collectively twisted and bundled, a binding tape is wound on an outer circumference thereof, and an outer circumference of the binding tape is further shielded by an overall shield and covered by a sheath, which is an outer coating, thereby forming a signal cable.
    Type: Application
    Filed: July 31, 2012
    Publication date: November 22, 2012
    Applicant: OLYMPUS MEDICAL SYSTEMS CORP.
    Inventors: Akira MURAMATSU, Takahiko MITANI
  • Publication number: 20090292169
    Abstract: An electronic endoscope apparatus includes: an image pickup apparatus mounted at a distal end portion of an insertion portion; an operation portion provided consecutively at the insertion portion, with a frame member incorporated therein; and an electrical cable extended from the operation portion for connection with an external device. In the electronic endoscope apparatus, the frame member has a circuit board portion which establishes electrical connection between shields of the insertion portion and the electrical cable, and on which various electronic parts for exchanging signals with the image pickup apparatus are mounted. In spite of the arrangement of the image pickup apparatus that can acquire high-quality images at a distal end portion of the insertion portion, a size of the apparatus, in particular, a diameter of the insertion portion, can be prevented from being increased.
    Type: Application
    Filed: April 29, 2009
    Publication date: November 26, 2009
    Applicant: OLYMPUS MEDICAL SYSTEMS CORP.
    Inventors: Takahiko MITANI, Akira MURAMATSU, Seiji SAKAI, Tomoaki YAMASHITA, Masahiro KAWAUCHI, Yuichi WATAYA
  • Publication number: 20090185032
    Abstract: An image pickup apparatus of the present invention varies optical properties by moving a part of lenses of an objective lens, and includes a solid-state image pickup device unit that is disposed at a rear-end section and that subjects a subject image to photoelectric conversion, a fixed lens frame that retains the objective lens that is disposed in front of the solid-state image pickup device unit, a movable lens frame that retains the part of lenses that moves along a photographing optical axis O inside the lens frame, and an actuator having one end connected to the movable lens frame and that moves the movable lens frame forward and backward. The actuator includes a rigid member provided so as to extend to the vicinity of the rear end at which the solid-state image pickup device unit is disposed and a shape memory alloy that is coupled to the rigid member.
    Type: Application
    Filed: December 12, 2008
    Publication date: July 23, 2009
    Applicant: OLYMPUS MEDICAL SYSTEMS CORP.
    Inventors: Seiji SAKAI, Tomoaki YAMASHITA, Masahiro KAWAUCHI, Takahiko MITANI, Yuuya ISHIDA, Seiji IWASAKI
  • Publication number: 20070118019
    Abstract: A tip portion main body provided on the tip of the insertion portion has an erecting device disposed in the vicinity of the channel tip opening, capable of changing the protruding direction of the treatment tool, a solid-state image-capturing device, an objective optical system, having a predetermined field of view angle for capturing an image within the body cavity including the treatment tool protruding from the tip opening with a first field of view angle equating to the upper field of view angle during observation, and forms this image at the solid-state image-capturing device; and a second field of view angle equating to the lower field of view angle during observation, with the tip side of the insertion portion as the field of vision range, and the first field of view angle is set to be the same or smaller than the second field of view angle.
    Type: Application
    Filed: January 5, 2007
    Publication date: May 24, 2007
    Applicants: OLYMPUS MEDICAL SYSTEMS CORP., OLYMPUS CORPORATION
    Inventors: Takahiko Mitani, Kazuhiro Kumei, Kazuyoshi Akiba, Seiji Sakai, Hironobu Ichimura, Masahiro Kawauchi
  • Patent number: 6579560
    Abstract: A soybean processed food having crisp feelings of eating and good tasting is provided. The soybean processed food is produced by kneading a mixture of a soybean-derived material and a condiment in the presence of water to obtain dough, and drying the dough under a reduced pressure of 0.1 kPa to 10 kPa. It is preferred that the soybean-derived material contains isolated soybean protein as the major constituent, soybean saccharide, soybean dietary fiber, and/or soybean lecithin.
    Type: Grant
    Filed: March 9, 2001
    Date of Patent: June 17, 2003
    Assignee: Sanko Corporation
    Inventors: Masaru Kagawa, Koichiro Shioaki, Rumi Tsuchiya, Noriaki Hayashi, Takahiko Mitani
  • Publication number: 20010028907
    Abstract: A soybean processed food having crisp feelings of eating and good tasting is provided. The soybean processed food is produced by kneading a mixture of a soybean-derived material and a condiment in the presence of water to obtain dough, and drying the dough under a reduced pressure of 0.1 kPa to 10 kPa. It is preferred that the soybean-derived material contains isolated soybean protein as the major constituent, soybean saccharide, soybean dietary fiber, and/or soybean lecithin.
    Type: Application
    Filed: March 9, 2001
    Publication date: October 11, 2001
    Inventors: Masaru Kagawa, Koichiro Shioaki, Rumi Tsuchiya, Noriaki Hayashi, Takahiko Mitani
  • Patent number: 5869460
    Abstract: There are described sulfated and phosphated saccharide erivatives of the Formula ##STR1## wherein R.sub.1 is hydrogen atom or a residue of sulfate, phosphate or L-fucose; R.sub.2, R.sub.3 and R.sub.4 are hydrogen atom or a residue of sulfate or phosphate, respectively; 1 is an integer of 0 or 1;m is an integer of 0-15; and n is an integer of 0-21, or pharmaceutically acceptable salts thereof, a process for the preparation of the derivatives and salts as well as use thereof, as an anti-inflammatory agent.
    Type: Grant
    Filed: October 29, 1996
    Date of Patent: February 9, 1999
    Assignee: Sanwa Kaguku Kenkyusho Co., Ltd.
    Inventors: Toshinao Usui, Takao Igami, Takuji Kakigami, Hitoshi Hamashima, Takahito Jomori, Akira Tashita, Yoshiro Ishiwatari, Shoji Yokochi, Takahiko Mitani, Yasuo Suzuki, Akira Hasegawa
  • Patent number: 5730971
    Abstract: A potentiator for interferon and an antiviral activity-potentiating composition containing interferon and its potentiator are provided. The potentiator is a mixture of flavin adenine dinucleotide (FAD) and porcine liver extract.
    Type: Grant
    Filed: December 20, 1994
    Date of Patent: March 24, 1998
    Assignee: Sanwa Kagaku Kenkyusho Co., Ltd.
    Inventors: Yoshiro Ishiwata, Takahito Jomori, Hidetsugu Saito, Takahiko Mitani, Kiichi Sawai
  • Patent number: 5621003
    Abstract: A maillard reaction inhibitor comprising, as the principal component, an eight-structural polymer of 3-oxygermylpropionic acid represented by the following stereostructure (I): ##STR1## wherein R represents --CH.sub.2 CH.sub.2 COOH, and m is a weight average polymerization degree calculated on the basis of the weight average molecular weight of propagermanium propyl ester and is 137.+-.84 (137 on average with a standard deviation of .+-.3.sigma.); and having the following minimum constitutional unit:(O.sub.1/2).sub.3 GeCH.sub.2 CH.sub.2 COOHand the following empirical formula:C.sub.6 H.sub.10 Ge.sub.2 O.sub.7,a method for inhibiting the Maillard reaction, and a method for preventing and treating diseases caused by Maillard reaction such as diabetes and concurrent diseases thereof.
    Type: Grant
    Filed: August 15, 1995
    Date of Patent: April 15, 1997
    Assignee: Sanwa Kagaku Kenkyusho Co., Ltd.
    Inventors: Kiichi Sawai, Takahiko Mitani, Naohisa Ninomiya, Yoshiro Ishiwata
  • Patent number: 5560925
    Abstract: Wart of human being is prevented or cured by administration of a pharmaceutical composition containing an eight structural polymer of 2-oxygermylpropionic acid having an empirical formula of C.sub.6 H.sub.10 Ge.sub.2 O.sub.7, a minimum constitutional unit of (O.sub.1/2).sub.3 GeCH.sub.2 CH.sub.2 COOH and the following stereostructure: ##STR1## wherein R stands for --CH.sub.2 CH.sub.2 COOH and m is an integer of 137.+-.84.
    Type: Grant
    Filed: October 3, 1994
    Date of Patent: October 1, 1996
    Assignee: Sanwa Kagaku Kenkyusho Co., Ltd.
    Inventors: Kiichi Sawai, Takahiko Mitani, Naohisa Ninomiya, Yoshiro Ishiwata
  • Patent number: 5532272
    Abstract: A novel, eight structural polymer of 2-oxygermylpropionic acid having an empirical formula of C.sub.6 H.sub.10 Ge.sub.2 O.sub.7, a minimum constitutional unit of (O.sub.1/2).sub.3 GeCH.sub.2 CH.sub.2 COOH and the following stereostructure: ##STR1## wherein R stands for --CH.sub.2 CH.sub.2 COOH and m is an integer of 137.+-.84. A pharmaceutical composition containing the novel polymer is useful for preventing symptoms of an immune disease such as hepatitis or for curing such a disease.
    Type: Grant
    Filed: May 20, 1994
    Date of Patent: July 2, 1996
    Assignee: Sanwa Kagaku Kenkyusho Co., Ltd.
    Inventors: Kiichi Sawai, Takahiko Mitani, Naohisa Ninomiya, Yoshirou Ishiwata
  • Patent number: 5474913
    Abstract: Process for the preparation of motilin-like polypeptide, a recombinant DNA therefor, and a plasmid, in which the recombinant DNA is inserted.
    Type: Grant
    Filed: January 26, 1993
    Date of Patent: December 12, 1995
    Assignee: Sanwa Kagaku Kenkyusho Co., Ltd.
    Inventors: Masayasu Kurono, Takahiko Mitani, Haruo Takahashi, Kenichi Tanaka, Katsuya Fujimura, Kiichi Sawai
  • Patent number: 5468728
    Abstract: A readily absorbable type of motilin preparation containing a motilin-like active substance and a surface active agent is provided, in which the motilin-like active substance is mainly L-leucine-13-motilin-homoserine, and the surface active agent is selected from the group consisting of a bile salt, saponin and a polyethylene glycol higher-alcohol ether for nasal administration purposes and is a peptide lytic enzyme inhibitor for oral administration purposes.
    Type: Grant
    Filed: September 8, 1993
    Date of Patent: November 21, 1995
    Assignee: Sanwa Kagaku Kenkyusho Co., Ltd.
    Inventors: Kiichi Sawai, Masayasu Kurono, Takahiko Mitani, Makoto Sato, Hiroyuki Oowaki, Bunkichi Kato, Haruo Takahashi