E Ink announced it had filed a patent infringement lawsuit against Trekstor in Germany. According to E Ink, Trekstor has infringed (and still does) on two patents:
- Electronically addressable microencapsulated ink (EP 1 231 500 B1)
- Electrophoretic displays and materials". (EP 1 010 036)
Trekstor are distributing two e-readers in Germany called Pyrus and 4Ink. The e-paper display in those e-readers are manufactured by a company named "Guangzhou OED Technologies" based in China.