Patents by Inventor Yoshio Obata

Yoshio Obata 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).

  • Light guide member and light guide member manufacturing method
    Patent number: 10295725
    Abstract: A light guide member includes a reflective surface with a diffusion groove array. The diffusion groove array includes diffusion grooves arranged in the reflective surface in a length direction of the light guide member. The diffusion groove array includes, as the diffusion grooves, at least two inspection grooves and a non-inspection diffusion groove. The two inspection grooves are spaced in the length direction of the light guide member. The non-inspection diffusion groove is between the two inspection grooves. An intermediate part, in a length direction, of each of the two inspection grooves is divided by an ungrooved portion with no groove.
    Type: Grant
    Filed: July 21, 2015
    Date of Patent: May 21, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Hideki Koizumi, Takeshi Ito, Tatsuji Ono, Yoshio Obata, Mamoru Ishizuka
  • LIGHT GUIDE MEMBER AND LIGHT GUIDE MEMBER MANUFACTURING METHOD
    Publication number: 20170205562
    Abstract: A light guide member includes a reflective surface with a diffusion groove array. The diffusion groove array includes diffusion grooves arranged in the reflective surface in a length direction of the light guide member. The diffusion groove array includes, as the diffusion grooves, at least two inspection grooves and a non-inspection diffusion groove. The two inspection grooves are spaced in the length direction of the light guide member. The non-inspection diffusion groove is between the two inspection grooves. An intermediate part, in a length direction, of each of the two inspection grooves is divided by an ungrooved portion with no groove.
    Type: Application
    Filed: July 21, 2015
    Publication date: July 20, 2017
    Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LT D.
    Inventors: Hideki KOIZUMI, Takeshi ITO, Tatsuji ONO, Yoshio OBATA, Mamoru ISHIZUKA
  • Method of producing grain-oriented silicon steel sheets having substantially no glass film
    Patent number: 4255205
    Abstract: A grain-oriented silicon steel sheet having substantially no glass film can be obtained by subjecting a cold rolled silicon steel sheet having a final gauge to a decarburization annealing to form subscale on the steel sheet surface, applying an annealing separator consisting of hydrated silicate mineral fine powder, a strontium- or barium-containing compound, calcium oxide or calcium hydroxide and the remainder being Al.sub.2 O.sub.3, and finally annealing the above treated steel sheet. The steel sheet has excellent punchability when the steel sheet is coated with a phosphate system or chromate-organic resin mixture system insulating coating.
    Type: Grant
    Filed: December 12, 1979
    Date of Patent: March 10, 1981
    Assignee: Kawasaki Steel Corporation
    Inventors: Nobuyuki Morito, Toshitomo Sugiyama, Yoshio Obata
  • Method for manufacturing single-oriented electrical steel sheets comprising antimony and having a high magnetic induction
    Patent number: 3932234
    Abstract: Single-oriented electrical steel sheets having a high magnetic induction can be produced by hot rolling a silicon steel raw material containing less than 0.06% of C and less than 4% of Si, subjecting to annealing step and cold rolling step conveniently repeatedly to form a cold rolled steel sheet having a final gauge and subjecting to a decarburization annealing and a final annealing to develop secondary recrystallized grains having (110)[001] orientation, said silicon steel raw material being characterized in containing 0.005-0.200% of Sb and less than 0.10% of at least one of Se and S.Said final annealing for secondary recrystallization at a temperature of 800.degree.-920.degree.C gives a preferable result.
    Type: Grant
    Filed: October 9, 1973
    Date of Patent: January 13, 1976
    Assignee: Kawasaki Steel Corporation
    Inventors: Takuichi Imanaka, Takahiro Kan, Yoshio Obata, Toru Sato