Patents by Inventor Michihiko Namba

Michihiko Namba 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: 11961345
    Abstract: A vehicle (20) transmits an LF command (Wa), an electronic key (30) transmits, to the vehicle (20), an RF command responsive to the LF command (Wa), the vehicle (20) transmits, to the electronic key (30), an LF command (Wb) having a longer packet length than the LF command (Wa), and the electronic key (30) transmits, to the vehicle (20), an RF command responsive to the LF command (Wb) on the basis of the electric field strength of an LF-RSSI burst of a part of the LF command (Wb), thus turning on an interior light (501).
    Type: Grant
    Filed: September 24, 2021
    Date of Patent: April 16, 2024
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Michihiko Fukuda, Masami Takigawa, Hitoshi Namba
  • Publication number: 20240117206
    Abstract: An ink contains water, a coloring material, a resin, and an organic solvent, wherein the dried layer of the ink has a surface free energy ?S having a polar component ?Sp of from 3.5 to 20 J/m2 at 25 degrees C.
    Type: Application
    Filed: September 22, 2023
    Publication date: April 11, 2024
    Applicant: Ricoh Company, Ltd.
    Inventors: Mayumi YOSHIHARA, Michihiko Namba, Takashi Tamai, Shin Hasegawa, Yuta Nakamura, Daiki Hasebe
  • Publication number: 20230183501
    Abstract: An ink contains water, a coloring material, a resin, two or more types of organic solvents, and a surfactant, wherein the ink is horizontally discharged to a substrate.
    Type: Application
    Filed: October 27, 2022
    Publication date: June 15, 2023
    Inventors: Shin HASEGAWA, Takashi TAMAI, Michihiko NAMBA, Yuta NAKAMURA, Mayumi YOSHIHARA, Daiki HASEBE
  • Patent number: 10829657
    Abstract: An active energy ray-curable composition is provided which comprises a polymerizable monomer, a polysilane compound containing a phenyl group in a repeating unit, and a photopolymerization initiator.
    Type: Grant
    Filed: February 26, 2019
    Date of Patent: November 10, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Hidetoshi Fujii, Michihiko Namba, Manabu Arita
  • Patent number: 10689536
    Abstract: An ink is provided. The ink includes a colorant, an organic solvent, a resin particle including an anionic urethane resin, and an organic amine compound having a boiling point in the range of from 120° C. to 200° C. and a molecular weight of 100 or less, and water, and the mass ratio of the organic amine compound to the resin particle is in the range of from 0.01 to 1.00.
    Type: Grant
    Filed: February 24, 2016
    Date of Patent: June 23, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Amika Sagara, Hidetoshi Fujii, Michihiko Namba, Hiroaki Takahashi, Kiminori Masuda
  • Patent number: 10428232
    Abstract: An ink set includes an ink A including water, an organic solvent A, a self-dispersible pigment, an anionic resin particle, and an amine compound having a boiling point of 120 degrees C.-200 degrees C. and an ink B including water, an organic solvent B, and a resin-coated pigment, wherein when the mass content of the amine compound is determined as 1, the mass content of the anionic resin particle is 1-100 and the mass content of the resin-coated pigment is 10-200, while the mass content of the anionic resin particle and the mass content of the resin-coated pigment are respectively based on the content per unit of mass of the ink A and the content per unit of mass of the ink B.
    Type: Grant
    Filed: September 29, 2016
    Date of Patent: October 1, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Amika Sagara, Michihiko Namba, Hiroaki Takahashi, Kiminori Masuda
  • Publication number: 20190270901
    Abstract: An active energy ray-curable composition is provided which comprises a polymerizable monomer, a polysilane compound containing a phenyl group in a repeating unit, and a photopolymerization initiator.
    Type: Application
    Filed: February 26, 2019
    Publication date: September 5, 2019
    Inventors: Hidetoshi FUJII, Michihiko NAMBA, Manabu ARITA
  • Patent number: 10301487
    Abstract: An inkjet recording device includes an ink, a discharging head to discharge the ink to a recording medium, and a cleaning liquid, wherein the ink comprises water, a urethane resin having a glass transition temperature of 0 degrees C. or lower, a pigment, a compound represented by the following Chemical formula 1, and a surfactant, wherein the cleaning liquid comprises water, a compound represented by the following Chemical formula 1, a glycol ether compound, and a surfactant, where Me represents a methyl group, R1 represents an alkyl group having 1 to 4 carbon atoms.
    Type: Grant
    Filed: January 19, 2018
    Date of Patent: May 28, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroaki Takahashi, Michihiko Namba, Masahiro Kido, Yuta Nakamura, Naoto Shimura, Akiko Bannai, Shizuka Kohzuki
  • Patent number: 10280321
    Abstract: An ink includes a pigment, a wax, a water soluble solvent including a solvent having an SP value of from 9.0 to 11.0, and water, wherein the mass ratio of the content of the wax in the ink to the content of the solvent having an SP value of from 9.0 to 11.0 is in a range of from 1.0:2.5 to 1.0:25.0.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: May 7, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Akihiko Matsuyama, Hiroshi Gotou, Michihiko Namba, Hidetoshi Fujii, Amika Sagara, Kazukiyo Nagai, Tomoyuki Shimada, Shigeyuki Harada, Yoshiki Yanagawa, Akiyoshi Sabu, Yuusuke Koizuka, Masayuki Fukuoka, Takuya Yamazaki
  • Patent number: 10189262
    Abstract: A cleaning liquid for rinsing an ink adhering to an article includes water and a first organic solvent, wherein a liquid mixture of the water and the first organic solvent has a Hansen solubility parameter including a hydrogen bond term of 10.0 (cal/cm3)1/2 or less, wherein the ink includes water, a second organic solvent, a polyurethane resin particle, and a polysiloxane surfactant having an HLB value of 8 or less, wherein the polyurethane resin particle accounts for 5 percent by mass or more of a total amount of the ink.
    Type: Grant
    Filed: December 14, 2017
    Date of Patent: January 29, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuta Nakamura, Michihiko Namba, Masahiro Kido, Hiroaki Takahashi, Hikaru Kobayashi, Naoto Shimura, Akiko Bannai, Shizuka Kohzuki
  • Patent number: 10174217
    Abstract: Provided is an ink including: a coloring material; an organic solvent; resin particles; an amine compound; and water, wherein the resin particles include urethane resin particles, and urethane-modified acrylic resin particles including a core portion containing an acrylic resin and a shell portion formed on a surface of the core portion and containing at least a urethane resin, and wherein the amine compound has a boiling point of 120 degrees C. or higher but 200 degrees C. or lower and a molecular weight of 100 or less.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: January 8, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroaki Takahashi, Michihiko Namba, Kiminori Masuda, Amika Sagara
  • Patent number: 10160248
    Abstract: A processing fluid contains a water soluble cation polymer having a quaternary ammonium cation in the main chain, either of one of phosphoric acid-based inorganic salt and p-tert-butyl benzoate, and water, wherein the phosphoric acid-based inorganic salt is either of one of disodium monohydrogen phosphate, sodium dihydrogen phosphate, sodium polyphosphate, dipotassium monohydrogen phosphate, and potassium dihydrogen phosphate, wherein the water soluble cation polymer accounts for 40% by weight to 60% by weight.
    Type: Grant
    Filed: June 3, 2015
    Date of Patent: December 25, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Shosuke Aoai, Michihiko Namba
  • Patent number: 10119042
    Abstract: An ink including: water; at least one organic solvent; a polysiloxane surfactant; and acryl-silicone resin particles, where the polysiloxane surfactant has an HLB value of 8 or less.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: November 6, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Masahiro Kido, Juichi Furukawa, Hidefumi Nagashima, Yuta Nakamura, Masaaki Tsuda, Hikaru Kobayashi, Yukihiro Imanaga, Michihiko Namba, Hiroaki Takahashi, Takahiro Yoshida
  • Patent number: 10066112
    Abstract: A white ink containing one or more organic solvents including 40 percent by mass or more of an amide compound of formula 1 is provided: wherein, R1 represents a straight-chained or branch-chained alkyl group having one to six carbon atoms, R2 and R3 each, independently represent hydrogen atoms or straight-chained or branch-chained alkyl groups having 1 to 4 carbon atoms.
    Type: Grant
    Filed: May 9, 2017
    Date of Patent: September 4, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuta Nakamura, Michihiko Namba, Hiroaki Takahashi, Hikaru Kobayashi
  • Publication number: 20180208783
    Abstract: An inkjet recording device includes an ink, a discharging head to discharge the ink to a recording medium, and a cleaning liquid, wherein the ink comprises water, a urethane resin having a glass transition temperature of 0 degrees C. or lower, a pigment, a compound represented by the following Chemical formula 1, and a surfactant, wherein the cleaning liquid comprises water, a compound represented by the following Chemical formula 1, a glycol ether compound, and a surfactant, where Me represents a methyl group, R1 represents an alkyl group having 1 to 4 carbon atoms.
    Type: Application
    Filed: January 19, 2018
    Publication date: July 26, 2018
    Inventors: Hiroaki TAKAHASHI, Michihiko Namba, Masahiro Kido, Yuta Nakamura, Naoto Shimura, Akiko Bannai, Shizuka Kohzuki
  • Publication number: 20180170061
    Abstract: A cleaning liquid for rinsing an ink adhering to an article includes water and a first organic solvent, wherein a liquid mixture of the water and the first organic solvent has a Hansen solubility parameter including a hydrogen bond term of 10.0 (cal/cm3)1/2 or less, wherein the ink includes water, a second organic solvent, a polyurethane resin particle, and a polysiloxane surfactant having an HLB value of 8 or less, wherein the polyurethane resin particle accounts for 5 percent by mass or more of a total amount of the ink.
    Type: Application
    Filed: December 14, 2017
    Publication date: June 21, 2018
    Inventors: Yuta NAKAMURA, Michihiko Namba, Masahiro Kido, Hiroaki Takahashi, Hikaru Kobayashi, Naoto Shimura, Akiko Bannai, Shizuka Kohzuki
  • Patent number: 9937715
    Abstract: An inkjet recording method includes applying one or more drive pulses to a pressure generating device of a recording head including a nozzle plate, a liquid chamber, and discharging droplets of ink from the nozzle. Also, the following conditions 1 and 2 are satisfied. 1. The ink has a dynamic surface tension 10 mN/m or more greater than the static surface tension of the ink when the surface life length is 15 ms and 3 mN/m or more greater than the static surface tension of the ink when the surface life length is 1,500 ms, as measured by maximum bubble pressure technique at 25 degrees C. 2. At least one of the drive pulses has a voltage changing portion to draw in the ink, the voltage changing portion having a changing time of one third or more of the resonance period of the liquid chamber.
    Type: Grant
    Filed: November 14, 2016
    Date of Patent: April 10, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Kiminori Masuda, Satomi Araki, Michihiko Namba, Hiroaki Takahashi, Amika Sagara
  • Patent number: 9879207
    Abstract: A cleaning filling liquid for inkjet device including water; 10.0% by mass to 45% by mass per whole amount of the cleaning filling liquid of an amide compound having following formula (1).
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: January 30, 2018
    Assignee: RICOH COMPANY, LTD.
    Inventors: Takashi Tamai, Tomohiro Inoue, Hiroshi Gotou, Michihiko Namba, Akihiko Gotoh, Kiyofumi Nagai
  • Publication number: 20170335123
    Abstract: A white ink includes one or more organic solvents including an amide compound represented by the following Chemical formula 1, wherein the amide compound accounts for 40 percent by mass or more of the one or more organic solvents, In the chemical formula 1, R1 represents a straight-chained or branch-chained alkyl group having one to six carbon atoms, R2 and R3 each, independently represent hydrogen atoms or straight-chained or branch-chained alkyl groups having 1 to 4 carbon atoms.
    Type: Application
    Filed: May 9, 2017
    Publication date: November 23, 2017
    Inventors: Yuta NAKAMURA, Michihiko NAMBA, Hiroaki TAKAHASHI, Hikaru KOBAYASHI
  • Patent number: 9789720
    Abstract: To provide an image forming method, including applying a pre-treatment liquid on a recording medium including a substrate and a coating layer at least on one surface of the substrate, wherein the pre-treatment liquid is applied on a surface of the recording layer with the coating layer; drying the recording medium on which the pre-treatment liquid has been applied; and forming an image on the recording medium after drying by discharging a water-based ink by inkjet method, wherein the pre-treatment liquid includes a water-soluble cationic polymer, an ammonium salt of an organic acid and water, and wherein the water-based ink includes water and negatively charged colored particles including a colorant.
    Type: Grant
    Filed: July 5, 2013
    Date of Patent: October 17, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Shosuke Aoai, Tsutomu Maekawa, Michihiko Namba, Shinya Seno, Hiroshi Gotou, Akihiko Gotoh