TREA

Toshikazu Sasaki

Follow

Person

  • Kawagoe-shi, JP
People

Patents Grantslast 30 patents

  • Information Patent Grant

    Refill for a ball-point pencil
    • Patent number D1057017
    • Issue date Jan 7, 2025
    • Hidehei Kageyama
    • D19 - Office supplies
  • Information Patent Grant

    Writing instrument refills and writing instrument
    • Patent number 12,090,777
    • Issue date Sep 17, 2024
    • Kotobuki & Co., Ltd.
    • Hidehei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Mechanical pencil
    • Patent number 11,090,969
    • Issue date Aug 17, 2021
    • Kotobuki & Co., Ltd.
    • Hidehei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES

Patents Applicationslast 30 patents

  • Information Patent Application

    WRITING INSTRUMENT REFILLS AND WRITING INSTRUMENT
    • Publication number 20230347682
    • Publication date Nov 2, 2023
    • Kotobuki & Co., Ltd.
    • Hidehei KAGEYAMA
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    MECHANICAL PENCIL
    • Publication number 20210187994
    • Publication date Jun 24, 2021
    • Kotobuki & Co., Ltd.
    • Hidehei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES