Patents by Inventor Masayoshi Osaka

Masayoshi Osaka 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).

  • Screw or tapping screw
    Publication number: 20060147296
    Abstract: A screw or a tapping screw, comprising an ultra fine structure steel having ferrite grains of 3 ?m or smaller in average grain size and a nitrided layer on a surface part, wherein a strength is increased, a surface hardness is increased, and the surface hardness and an inside hardness are kept in balance, whereby a novel tapping screw and novel general screws can be provided.
    Type: Application
    Filed: October 17, 2003
    Publication date: July 6, 2006
    Inventors: Shiro Torizuka, Kotobu Nagal, Takafumi Komatsu, Naohisa Miyashita, Fumito Takagi, Masaaki Matsuzawa, Yoshimasa Miyasaka, Yoshiki Hatnato, Chiaki Fujimori, Masayoshi Osaka, Masaaki Uematsu, Hajime Hama
  • Opening/closing device of a door member
    Patent number: 5064255
    Abstract: An opening/closing device of a door for a refrigerator or the like will open/close the door member at a desired side, namely, at the right side or at the left side, without requiring a movable operating handle. The device is simple in construction, has a high adiabatic efficiency, and can be easily incorporated in the door member. Therefore, no special mechanism is necessary in the door member and no structural change is required inside the door member.
    Type: Grant
    Filed: May 14, 1990
    Date of Patent: November 12, 1991
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yoshio Inui, Masayoshi Osaka, Mitsuo Tanaka, Masao Miyamoto, Tooru Hasegawa, Masuo Kamitaka, Hidekazu Kai, Hiroshi Kamikubo
  • Opening/closing device of a door member
    Patent number: 4947583
    Abstract: An opening/closing device of a door for a refrigerator or the like will open/close the door member at a desired side, namely, at the right side or at the left side, without requiring a movable operating handle. The device is simple in construction, has a high adiabtic efficiency, and can be easily incorporated in the door member. Therefore, no special mechanism is necessary in the door member and no structural change is required inside the door member.
    Type: Grant
    Filed: May 5, 1989
    Date of Patent: August 14, 1990
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yoshio Inui, Masayoshi Osaka, Mitsuo Tanaka, Masao Miyamoto