06870661 is referenced by 194 patents and cites 110 patents.

An electrophoretic medium comprises a plurality of one or more types of particles suspended in a suspending fluid. The particles include at least one electrically charged, electrophoretically mobile particle capable of translating through the suspending fluid upon application of an electric field to the medium and at least one magnetic particle. A magnet is disposed adjacent the electrophoretic medium to introduce a threshold resistance to magnetic particle movement.

Title
Electrophoretic displays containing magnetic particles
Application Number
10/63655
Publication Number
6870661 (B2)
Application Date
May 7, 2002
Publication Date
March 22, 2005
Inventor
Emily J Pratt
Brookline
MA, US
Ian D Morrison
Acton
MA, US
Anthony Edward Pullen
Belmont
MA, US
Agent
David J Cole
Assignee
E Ink Corporation
MA, US
IPC
G02F 001/167
G01R 001/12
G03G 017/04
G09G 003/34
G02B 026/00
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