WRITING INSTRUMENT AND WRITING INSTRUMENT SET
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United States of America Patent
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N/A
Issued Date -
Apr 22, 2010
app pub date -
Oct 16, 2007
filing date -
Oct 17, 2006
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
Provided are a writing instrument produced at a lower cost than conventional thermochromic writing instruments utilizing frictional heat, slim like a pencil and not bulky because it contains an ink directly in a barrel thereof, and excellent in portability; and a set of the writing instruments. having an elasticity at the rear end portion of the barrel. The writing instrument set has a plurality of the writing instruments respectively different from each other in color tone.
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Family
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Cited Art Landscape
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