Patents by Inventor Masamichi Yoshida

Masamichi Yoshida 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).

  • Polytetrafluoroethylene production method
    Patent number: 11952441
    Abstract: A method for producing polytetrafluoroethylene, which includes polymerizing tetrafluoroethylene in an aqueous medium in the presence of a nucleating agent and a hydrocarbon anionic surfactant to obtain polytetrafluoroethylene. A total amount of the nucleating agent and the hydrocarbon anionic surfactant at the initiation of polymerization is more than 50 ppm based on the aqueous medium.
    Type: Grant
    Filed: October 3, 2019
    Date of Patent: April 9, 2024
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Taketo Kato, Yohei Fujimoto, Kenji Ichikawa, Hiroyuki Sato, Yoshinori Nanba, Hirotoshi Yoshida, Kengo Ito, Chiaki Okui, Masamichi Sukegawa, Taku Yamanaka
  • Toy accessories
    Patent number: 4936699
    Abstract: A toy accessory has a plastic accessory base having plural engaging parts. At least two different ornamental parts made of a composition for writing which contains a polyolefin are attached to the base. The ornamental parts are simultaneously detachably engaged with the base via the plural engaging parts.
    Type: Grant
    Filed: December 16, 1988
    Date of Patent: June 26, 1990
    Assignee: Buncho Corporation
    Inventor: Masamichi Yoshida
  • Puzzle crayon
    Patent number: D316730
    Type: Grant
    Filed: January 29, 1988
    Date of Patent: May 7, 1991
    Assignee: Buncho Corporation
    Inventor: Masamichi Yoshida