Writing implement

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 7011466
APP PUB NO 20030081981A1
SERIAL NO

10221773

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Patent Longevity
    Expired
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Abstract

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Liquid-for-ink (50) and a main part of colorant (60) for coloring the liquid-for-ink (50) are separately stored within a writing implement. The writing implement is so fabricated that the colorant (60) is added to the liquid-for-ink (50) while the liquid-for-ink (50) is introduced to a writing tip (70).

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Patent Owner(s)

Patent OwnerAddress
MITSUBISHI PENCIL KABUSHIKIKAISHA23-37 HIGASHIOOI 5-CHOME SHINAGAWA-KU TOKYO 140-0011

International Classification(s)

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  • 2001 Application Filing Year
  • B43K Class
  • 168 Applications Filed
  • 39 Patents Issued To-Date
  • 23.22 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances200120022003200420050255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Iida, Hisashi Yokohama, JP 77 1161
Okumura, Shigeru Yokohama, JP 4 40

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Patent Citation Ranking

  • 3 Citation Count
  • B43K Class
  • 2.33 % this patent is cited more than
  • 19 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges125133101 - 1011 - 2021 - 3041 - 500246810121416182022242628

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