Patents by Inventor Keigo Seki

Keigo Seki 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: 20210096081
    Abstract: A polymer dye includes at least one repeating unit represented by the following structural formula 1 and at least one selected from the group consisting of repeating units represented by the following structural formulas 2 and 3. Hydrogen peroxide present in or generated through enzymatic reaction in a biological sample can be detected by using the polymer dye.
    Type: Application
    Filed: December 2, 2020
    Publication date: April 1, 2021
    Inventors: Keigo Mizusawa, Ryuji Higashi, Masanori Seki, Takeshi Yamamoto, Kengo Kanazaki
  • Patent number: 10877106
    Abstract: In a jig main body constructing a conduction inspection jig, a pin guard plate is arranged so as to be movable back and forth between the main body bottom portion and the main body guide portion. Before conduction inspection, the tip end of a conduction pin is positioned outside the conduction pin hole. When the pin guard plate moves towards a side of the main body bottom portion with a start of the conduction inspection, only the tip end of the normal conduction pin without bent enters into the conduction pin hole and penetrates, and thereby protrudes from the conduction pin hole. An inspection method of a conduction pin includes an arranging step of arranging the tip end outside the conduction pin hole, a moving step of moving the pin guard plate, and a detecting step of detecting whether or not the tip end enters into the conduction pin hole.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: December 29, 2020
    Assignee: YAZAKI CORPORATION
    Inventors: Shoichi Watanabe, Keigo Seki, Hiroshi Takeuchi
  • Patent number: 10577481
    Abstract: Provided is a polymer that can detect a low-molecular weight compound, in particular, 8-OHdG with high sensitivity and can be repeatedly used. Specifically, provided is a polymer including repeating units each represented by the following formula (1). In the formula (1), R1 and R2 are each independent for each repeating unit, R1 represents a hydrogen atom or an alkyl group, and R2 represents a group represented by the following formula (2) in at least one repeating unit, and represents a phenyl group, a hydroxyl group, an amino group, or a carboxyl group in any other repeating unit, and the group may be substituted with an alkyl group. In the formula (2), R3 represents a hydrogen atom, an alkyl group, or an aryl group, L represents a divalent linking group, and * represents a site to be bonded to the carbon atom bonding to R1 in formula (1).
    Type: Grant
    Filed: April 12, 2018
    Date of Patent: March 3, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Masanori Seki, Keigo Mizusawa, Ryuji Higashi, Masaru Sugita
  • Publication number: 20200011920
    Abstract: In a jig main body constructing a conduction inspection jig, a pin guard plate is arranged so as to be movable back and forth between the main body bottom portion and the main body guide portion. Before conduction inspection, the tip end of a conduction pin is positioned outside the conduction pin hole. When the pin guard plate moves towards a side of the main body bottom portion with a start of the conduction inspection, only the tip end of the normal conduction pin without bent enters into the conduction pin hole and penetrates, and thereby protrudes from the conduction pin hole. An inspection method of a conduction pin includes an arranging step of arranging the tip end outside the conduction pin hole, a moving step of moving the pin guard plate, and a detecting step of detecting whether or not the tip end enters into the conduction pin hole.
    Type: Application
    Filed: June 28, 2019
    Publication date: January 9, 2020
    Inventors: Shoichi Watanabe, Keigo Seki, Hiroshi Takeuchi
  • Patent number: 10358567
    Abstract: A compound is represented by the following formula (1). In the compound represented by Formula (1), at least one of R1 to R24 is a group particularly high electron withdrawing property, such as a sulfonic acid group and a carboxylic acid group or a group having the next highest electron withdrawing property to the sulfonic acid group and the carboxylic acid group, such as a halogen atom.
    Type: Grant
    Filed: February 24, 2017
    Date of Patent: July 23, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yutaka Tani, Masanori Seki, Yoshio Kinoshita, Keigo Gouda
  • Patent number: RE48108
    Abstract: An image forming apparatus includes: an image carrier; a toner image forming unit that forms a toner image on the image carrier; a transfer unit that transfers the toner image on the image carrier to a transfer target having ridges and valleys on a surface thereof; an adjusting unit that adjusts a ratio of A/B, where A is a transfer ratio [%] from the image carrier to a valley portion of the transfer target while B is a transfer ratio [%] from the image carrier to a ridge portion of the transfer target, based on an adjustment input by a user; and a control unit that controls a transfer condition of the transfer unit based on the ratio of A/B adjusted by the adjusting unit.
    Type: Grant
    Filed: September 12, 2016
    Date of Patent: July 21, 2020
    Assignee: RICOH COMPANY, LTD.
    Inventors: Emiko Shiraishi, Yasuhiko Ogino, Reki Nakamura, Keigo Nakamura, Takahiro Seki