Patents by Inventor Kei Yokokawa

Kei Yokokawa 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: 20230223694
    Abstract: An antenna device includes: a patch conductor provided on a substrate; a GND conductor provided in the substrate in such a manner as to face the patch conductor; GND pins that are provided in the substrate and that connect the patch conductor and the GND conductor; and an RF circuit provided on a first face of the patch conductor opposite to a second face of the patch conductor, the second face being attached to the substrate, the RF circuit being provided in such a manner as to be surrounded by the GND pins.
    Type: Application
    Filed: March 22, 2023
    Publication date: July 13, 2023
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Shunichi IKEDA, Kei YOKOKAWA, Narihiro NAKAMOTO, Akihito HIRAI, Toru FUKASAWA, Masataka OTSUKA
  • Patent number: 11621482
    Abstract: A conductor ground plane provided on a dielectric substrate and provided with a patch antenna and a conductor ground plane provided on the side of a dielectric substrate having a through hole are bonded by solder in a state where the through hole and the patch antenna are arranged to face each other, and a conductor ground plane provided on the back side of the dielectric substrate and a conductor ground plane provided on a dielectric substrate are bonded by solder.
    Type: Grant
    Filed: June 24, 2019
    Date of Patent: April 4, 2023
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kei Yokokawa, Narihiro Nakamoto, Toru Fukasawa, Hitoshi Arai, Tomohiro Takahashi, Kensuke Iwaki, Takamichi Kono, Keisuke Fujiwara
  • Publication number: 20220209402
    Abstract: A conductor ground plane provided on a dielectric substrate and provided with a patch antenna and a conductor ground plane provided on the side of a dielectric substrate having a through hole are bonded by solder in a state where the through hole and the patch antenna are arranged to face each other, and a conductor ground plane provided on the back side of the dielectric substrate and a conductor ground plane provided on a dielectric substrate are bonded by solder.
    Type: Application
    Filed: June 24, 2019
    Publication date: June 30, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventors: Kei YOKOKAWA, Narihiro NAKAMOTO, Toru FUKASAWA, Hitoshi ARAI, Tomohiro TAKAHASHI, Kensuke IWAKI, Takamichi KONO, Keisuke FUJIWARA
  • Patent number: 11183771
    Abstract: Included are: a first dielectric substrate provided with a first conductor ground plane on a front or back surface thereof; a plurality of patch antennas formed in the first conductor ground plane, a plurality of conductive members, ends of which connected to the first conductor ground plane to surround the patch antennas individually, and a second conductor ground plane connected to each of the other ends of the conductive members, and parts of the plurality of conductive members penetrate the first dielectric substrate, and the remaining parts of the conductive members function as spacers for providing an air layer between the first dielectric substrate and the second conductor ground plane, and the plurality of conductive members functions as spacers for providing an air layer between the first conductor ground plane and the second conductor ground plane.
    Type: Grant
    Filed: May 18, 2018
    Date of Patent: November 23, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kei Yokokawa, Narihiro Nakamoto, Toru Fukasawa, Tomohiro Takahashi, Masataka Otsuka
  • Patent number: 10992039
    Abstract: An array antenna device, including: a waveguide (1) having a plurality of radiation units (2) arranged on one tube wall thereof, in which the waveguide (1) has a plurality of grooves (3) arranged on an inner side of a tube wall facing the tube wall, movable short-circuit surfaces (4) each electrically short-circuited to an inner wall of one of the grooves (3), and movable short-circuit surface controlling mechanisms (5) for changing positions of the movable short-circuit surfaces (4).
    Type: Grant
    Filed: August 30, 2016
    Date of Patent: April 27, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kei Yokokawa, Jun Goto, Kazunari Kihira, Tomohiro Takahashi, Masataka Otsuka, Narihiro Nakamoto, Toru Fukasawa, Takuro Sasaki, Tomohiro Mizuno
  • Publication number: 20200395676
    Abstract: Included are: a first dielectric substrate provided with a first conductor ground plane on a front or back surface thereof; a plurality of patch antennas formed in the first conductor ground plane, a plurality of conductive members, ends of which connected to the first conductor ground plane to surround the patch antennas individually, and a second conductor ground plane connected to each of the other ends of the conductive members, and parts of the plurality of conductive members penetrate the first dielectric substrate, and the remaining parts of the conductive members function as spacers for providing an air layer between the first dielectric substrate and the second conductor ground plane, and the plurality of conductive members functions as spacers for providing an air layer between the first conductor ground plane and the second conductor ground plane.
    Type: Application
    Filed: May 18, 2018
    Publication date: December 17, 2020
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kei YOKOKAWA, Narihiro NAKAMOTO, Toru FUKASAWA, Tomohiro TAKAHASHI, Masataka OTSUKA
  • Publication number: 20190229418
    Abstract: An array antenna device, including: a waveguide (1) having a plurality of radiation units (2) arranged on one tube wall thereof, in which the waveguide (1) has a plurality of grooves (3) arranged on an inner side of a tube wall facing the tube wall, movable short-circuit surfaces (4) each electrically short-circuited to an inner wall of one of the grooves (3), and movable short-circuit surface controlling mechanisms (5) for changing positions of the movable short-circuit surfaces (4).
    Type: Application
    Filed: August 30, 2016
    Publication date: July 25, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventors: Kei YOKOKAWA, Jun GOTO, Kazunari KIHIRA, Tomohiro TAKAHASHI, Masataka OTSUKA, Narihiro NAKAMOTO, Toru FUKASAWA, Takuro SASAKI, Tomohiro MIZUNO
  • Publication number: 20150030976
    Abstract: A black toner for developing a latent electrostatic image, including: a toner base containing a pigment, a binder resin, a releasing agent, a compound containing fluorine and a compound containing sulfur; and an external additive, wherein the toner contains the external additive on a surface of the toner base, and wherein an amount of the fluorine in the toner base is 200 ppm by mass to 600 ppm by mass as measured by combustion-ion chromatography, and an amount of the sulfur in the toner base is 1,000 ppm by mass to 1,500 ppm by mass as measured by the combustion-ion chromatography.
    Type: Application
    Filed: February 28, 2013
    Publication date: January 29, 2015
    Inventors: Kei Yokokawa, Yasuaki Iwamoto, Takahiro Kadota
  • Publication number: 20100023412
    Abstract: (a) Step of a portable information processing device (65a) reading an image code by, editing first level personal information stored in the portable information processing device (65a) and information incorporated in the image code, and directly accessing a business server (64a) based on the edited information; and a license registration server (28) then receiving second level personal information of a higher security level than the first level personal information stored in the portable information processing device (64a) and network information of an access destination of the business server (64a); and (b) step of the license registration server (28) determining whether the portable information processing device (65a) is of a registered user; and (c) step of the license registration server (28) determining whether the business server (64a) has a registered license; and (d) step of the license registration check server (28) authorizing processing for the portable information processing device (65a) to transm
    Type: Application
    Filed: May 31, 2006
    Publication date: January 28, 2010
    Inventors: Yoshiko Kitagawa, Kei Yokokawa, Denzo Yamakawa
  • Publication number: 20080201576
    Abstract: An information-processing server (30) (a) receives an action request with first level private information from a first terminal (20); (b) authenticates the first terminal (20) based on the first level private information; (c) issues authentication information to the first terminal (20); (d) receives from the first terminal (20) second level private information of a higher security level than the first level private information as well as the authentication information; and (e) transmits the second level private information for an action requested, to a second terminal (51) based on the authentication information, in a system including the first terminal (20), the second terminal (51), and the information-processing server (30) mediating between the first terminal (20) and the second terminal (51).
    Type: Application
    Filed: May 19, 2004
    Publication date: August 21, 2008
    Applicant: KITAGAWA YOSHIKO
    Inventors: Yoshiko Kitagawa, Kei Yokokawa, Denzo Yamakawa, Takashi Kitagawa