Apple’s legal troubles are once again making news today as the company has been sued by Cequint, a mobile communications company specializing in the technology related to caller ID. The suit, filed in US District Court in Delaware, alleges that Apple’s iPhone infringes on two of the company’s patents, one relating to “Caller ID equipment which displays location of caller,” and one regarding “Decoding and processing system for advanced dtermination and display of city and state caller information.”

The company’s technology has already been integrated into T-Mobile’s Name ID service. The service, launched in July, marked the first time that true name-based caller ID service was made available to mobile phone customers. The court documentation currently available does not give any information as to how, specifically, Apple has violated Cequint’s patents.

Apple has been in the news for some time for legal troubles related to patent infringement. A suit against HTC that has long been seen as a proxy for Apple’s struggles with Android is expected to be decided in the next week. Meanwhile, the company is in the midst of a legal battle with Samsung that spans ten countries and twenty lawsuits, over Apple’s allegations that Samsung’s Galaxy Tab 10.1 and Galaxy phones are so similar to Apple’s iPad and iPhone devices as to constitute patent infringement.