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2019
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Invention
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Direct liquid-type writing instrument. [Problem] To provide a direct liquid-type writing instrume... |
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2014
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Invention
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Writing instrument and method for providing sealing means in writing instrument.
Problem to be S... |
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Invention
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Writing instrument and method for providing sealing means in writing instrument. [Problem] To pro... |
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Invention
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Ink reservoir member for writing instrument, and valve type writing instrument using the same. Pr... |
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Invention
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Ink storage member for writing instrument, and valve-type writing instrument using same. [Problem... |
