The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 09, 2012
Filed:
Nov. 28, 2007
Applicants:
Yoshihiro Ito, Nagoya, JP;
Shouichi Ohkawa, Nagoya, JP;
Katsuyuki Fujita, Nagoya, JP;
Inventors:
Assignee:
The Pilot Ink Co., Ltd., Nagoya-shi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B43K 29/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A friction body that produces frictional heat allowing development, disappearance or change of color of handwriting formed with a writing instrument for producing thermochromic handwriting, with the friction body having a friction coefficient of 0.2 to 1.0 when rubbed against paper surface, and a writing instrument for use in forming thermochromic handwriting which is equipped with the friction body and a writing instrument set including the friction body and a writing instrument for use in forming thermochromic handwriting.