Patents by Inventor Tomoharu OONISHI

Tomoharu OONISHI 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: 11993097
    Abstract: A mechanical pencil has: a shaft tube; a ferrule unit supported by the shaft tube; a lead holding unit having a chuck configured to relatively move with respect to the ferrule unit to eject lead held by the same; and an indication body provided movably in an axial direction. The indication body delimits from rearward a lead storage space formed rearward the chuck in the shaft tube. The indication body located at least at a predetermined position is viewable from outside the shaft tube. A length along the axial direction between a rear end of the lead storage space and a front end of the ferrule unit, in a state where the indication body has moved most rearward along the axial direction, is equal to or more than twice a length of spare lead to be stored in the lead storage space.
    Type: Grant
    Filed: June 17, 2020
    Date of Patent: May 28, 2024
    Assignee: KABUSHIKI KAISHA PILOT CORPORATION
    Inventors: Yusuke Sanada, Nobukazu Seri, Yuji Kawarazaki, Takumi Kajiwara, Tomoharu Oonishi
  • Publication number: 20220410614
    Abstract: A mechanical pencil has: a shaft tube; a ferrule unit supported by the shaft tube; a lead holding unit having a chuck configured to relatively move with respect to the ferrule unit to eject lead held by the same; and an indication body provided movably in an axial direction. The indication body delimits from rearward a lead storage space formed rearward the chuck in the shaft tube. The indication body located at least at a predetermined position is viewable from outside the shaft tube. A length along the axial direction between a rear end of the lead storage space and a front end of the ferrule unit, in a state where the indication body has moved most rearward along the axial direction, is equal to or more than twice a length of spare lead to be stored in the lead storage space.
    Type: Application
    Filed: June 17, 2020
    Publication date: December 29, 2022
    Inventors: Yusuke SANADA, Nobukazu SERI, Yuji KAWARAZAKI, Takumi KAJIWARA, Tomoharu OONISHI