Tera Xtal Technology has filed patent infringement lawsuits in a Taipei court against Apple and two local companies that distribute iPhones.

The Taiwan-based firm claims Apple illegally used its patented sapphire crystal technology in iPhone camera lenses, the Taipei Times reported. Lawsuits were also filed against retailer Senao International and Vibo Telecom, a small mobile operator.

Tera Xtal is seeking damages of NT$300 million ($9.86 million).

Company representative Peggy Hsu told the Times: “Targeting the company with the biggest sales volume is just our first step,” leaving open the possibility of future lawsuits against other handset makers.

The Times also reported that Tera Xtal said it received a US court ruling that its sapphire crystal equipment maker, GT Advanced Technologies, has to refund the $24.29 million Tera Xtal paid for a machine, which turned out not to function properly.

GT Advanced Technologies on Monday filed for bankruptcy protection in the US. Tera Xtal has been paid $7 million but is waiting for the remaining $17.29 million, which Hsu said she thought it would recover.