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:
Nov. 09, 2004
Filed:
Dec. 21, 2000
Applicant:
Inventors:
Shigeyuki Harada, Shizuoka-ken, JP;
Mitsunobu Morita, Shizuoka-ken, JP;
Kunio Hayakawa, Shizuoka-ken, JP;
Assignee:
Ricoh Company Limited, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G09G 3/34 ;
U.S. Cl.
CPC ...
G09G 3/34 ;
Abstract
An electrophoretic display material and apparatus is disclosed, including a dispersion medium, a white particulate material having a volume median particle diameter Dw, and a colored particulate material having a color different from the color of the white particulate material and a volume median particle diameter Dc, and wherein a ratio Dc/Dw is from 1/1 to 1/50.