Writing implement

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11472221
SERIAL NO

16606316

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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An object is to provide a writing implement allowing the width of a drawn line to be freely changed by writing pressure that is capable of application to a narrow-shafted felt-tip pen or marker pen. The writing implement includes a shall tube, an ink supply core that is housed inside the shaft tube and that guides ink by capillary action, and a core surrounding member that is fitted to a leading end of the shaft tube, that is penetrated by the ink supply core, and from which a tip of the ink supply core projects. The ink supply core is configured to retract at a tip of the core surrounding member under writing pressure, and a projection dimension of the ink supply core from the tip of the core surrounding member is from 0.05 mm to 0.7 mm.

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First Claim

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Patent Owner(s)

Patent OwnerAddress
MITSUBISHI PENCIL COMPANY LIMITED23-37 HIGASHI-OHI 5-CHOME SHINAGAWA-KU TOKYO 140-8537

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fukumoto, Takeo Yokohama, JP 20 92
Nakajima, Tooru Yokohama, JP 16 85
Oono, Gouya Yokohama, JP 1 0

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