Patents by Inventor Takeyuki Kamiyama

Takeyuki Kamiyama 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).

  • Self-inking stamp
    Patent number: 8302531
    Abstract: One object of the present invention is to provide a self-inking stamp which can easily perform replacement of a character arrangement block or an ink pad without sudden release of locked condition of the stamp during the replacement operation.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: November 6, 2012
    Assignee: Shachihata Inc.
    Inventors: Takeyuki Kamiyama, Motokazu Ito
  • Self-inking stamp
    Publication number: 20100326299
    Abstract: One object of the present invention is to provide a self-inking stamp which can easily perform replacement of a character arrangement block or an ink pad without sudden release of locked condition of the stamp during the replacement operation.
    Type: Application
    Filed: March 5, 2010
    Publication date: December 30, 2010
    Inventors: Takeyuki Kamiyama, Motokazu Ito
  • Felt pen
    Patent number: D447174
    Type: Grant
    Filed: December 29, 2000
    Date of Patent: August 28, 2001
    Assignee: Shachihata Inc.
    Inventor: Takeyuki Kamiyama
  • Scissors
    Patent number: D902680
    Type: Grant
    Filed: December 5, 2018
    Date of Patent: November 24, 2020
    Assignee: SHACHIHATA INC.
    Inventors: Takeyuki Kamiyama, Natsuki Yamada, Musashi Kimura