Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Hitoshi Suzuki0
Kyo Nakayama0
Takeo Fukumoto0
Date of Patent
November 18, 2008
Patent Application Number
10597774
Date Filed
March 10, 2005
Patent Primary Examiner
Patent abstract
A lead holding structure of a mechanical pencil where a predetermined lead holding force is maintained so that a lead does not move even if a writing pressure is repeatedly applied to the lead and where a so-called biting-off of a lead (break) is prevented without damaging the lead in repeatedly sending forward and backward operations.
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