Patents by Inventor Yoshihito Yoshikawa

Yoshihito Yoshikawa 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).

  • Data communication method and data communication system
    Patent number: 8429732
    Abstract: A first server in a system includes confirmation requesting unit 110 that receives an authentication request from a predetermined apparatus 400 coupled through a public line and that sends a user confirmation request to a second server in the case where user authentication is successful. A second server includes a user facility identifying unit 210 that receives the user confirmation request from the first server and identifies location information of the user facility of the user and a confirmation result notifying unit 211 that receives a utilization request from a measuring apparatus linked through a dedicated line and identifies disposition location information of the measuring apparatus and that sends a notification of success of user confirmation including the identification information of the user to the first server 100 if the disposition location information of the measuring apparatus is identical to the user facility location information.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: April 23, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Mika Kasahara, Yoshihito Yoshikawa, Maki Nagano, Nobuyoshi Ando
  • INFORMATION PROCESSING METHOD AND INFORMATION PROCESSING SYSTEM
    Publication number: 20110016517
    Abstract: A first server in a system includes confirmation requesting unit 110 that receives an authentication request from a predetermined apparatus 400 coupled through a public line and that sends a user confirmation request to a second server in the case where user authentication is successful. A second server includes a user facility identifying unit 210 that receives the user confirmation request from the first server and identifies location information of the user facility of the user and a confirmation result notifying unit 211 that receives a utilization request from a measuring apparatus linked through a dedicated line and identifies disposition location information of the measuring apparatus and that sends a notification of success of user confirmation including the identification information of the user to the first server 100 if the disposition location information of the measuring apparatus is identical to the user facility location information.
    Type: Application
    Filed: June 30, 2010
    Publication date: January 20, 2011
    Applicant: HITACHI, LTD.
    Inventors: Mika KASAHARA, Yoshihito YOSHIKAWA, Maki NAGANO, Nobuyoshi ANDO
  • Ferrite core, CATV equipment and bi-directional CATV system
    Patent number: 7061355
    Abstract: A ferrite core for use in coupling transformers and distributing transformers in CATV equipments such as couplers, distributors and amplifiers, the ferrite core being made of a ferrite having a saturation magnetostriction |?S| of 8×10?6 or less in an absolute value and an initial permeability ?i of 300 or more.
    Type: Grant
    Filed: August 28, 2003
    Date of Patent: June 13, 2006
    Assignee: Hitachi Metals, Ltd.
    Inventors: Satoru Tanaka, Norikazu Koyuhara, Makoto Kadowaki, Yoshihito Yoshikawa, Shiro Murakami