Patents by Inventor Kazuhiko Osaki

Kazuhiko Osaki 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: 4547946
    Abstract: A method for producing a nondirectional pen includes the steps of drawing a metal pipe to form a pen blank having three or more radial blade sections extending along the length of the pen blank and equally spaced angularly away from one another, each of the radial blade sections including an internal gap extending along the length of that blade section; cutting the pen blank into pen bodies having a predetermined length; shaping the forward end of each of the pen bodies into a substantially conical configuration; slotting the pen body from its tip to form longitudinal slots each aligning with the internal gap of the corresponding radial blade section; and providing a hard pen point capable of writing.
    Type: Grant
    Filed: February 13, 1984
    Date of Patent: October 22, 1985
    Assignee: The Sailor Pen Co., Ltd.
    Inventors: Kazuhiko Osaki, Hirofumi Hamamoto, Junzi Kurokawa, Shigeru Akieda
  • Patent number: 3945735
    Abstract: A socket for holding the writing ball of a ball point pen comprising an outer tubular member having a circular cross section and an inner tubular member having an elliptic or circular cross section, wherein an ink-conducting chamber or chambers are defined between the inner peripheral wall of the outer tubular member and the outer peripheral wall of the inner tubular member, thereby enabling ink to be conducted smoothly from an ink cartridge provided in the ball point pen through the chambers to the writing ball.
    Type: Grant
    Filed: December 30, 1974
    Date of Patent: March 23, 1976
    Assignee: The Sailor Pen Co., Ltd.
    Inventors: Koso Nakashiki, Akira Yoshimoto, Kazuhiko Osaki