According to a press release earlier this week, OpenTV and Nagravision, have filed lawsuits, in the U.S. District Court, suing Apple for patent infringement. The lawsuit involved five U.S. patents related to video playback technologies included in OS X and iOS mobile devices, iPhone (News - Alert), iPad and iPod. iAds, iTunes, the App Store and the Apple TV are also listed.

OpenTV is a global software technology company for interactive and digital television. The company was founded in 1994 and created through the merger of Thomson Multimedia and Sun Microsystems. Its primary business involves the sale of set-top-box operating systems and software, as well as some advanced advertising products.

Nagravision is a company that develops conditional access systems for cable and satellite television. The company name is also used as the name for their main products, the Nagravision encryption systems, which include four different versions and are used for digital satellite TV.

Both of these companies are subsidiaries of the Kudelski Group. This is a Swiss company that manufactures hardware and software digital security and convergent media systems for the delivery of digital and interactive content.

The company’s technologies are used in services and applications requiring access control and digital rights management for the monetization of digital media by content owners and service providers for digital television and interactive applications across broadcast, broadband and mobile delivery networks.

For those of you who like to read patents, the actual five patents that Apple (News - Alert) is being sued for are as follows:

• No: 5,689,799: “Method and apparatus for routing confidential information”
• No. 5,884,033: “Internet filtering system for filtering data transferred over the internet utilizing immediate and deferred filtering actions”
• No. 5,566,287: “Method for asynchronously maintaining an image on a display device”
• No. 6,985,586: “Distributed information storage system”
• No. 7,900,229: “Convergence (News - Alert) of interactive television wireless technologies”

As you may know, this is not the first, nor will it be the last patent lawsuit against Apple. Samsung (News - Alert) and Apple have been suing each other for years. Early last year Samsung sued Apple over four patent infringements. Back in October 2013, the International Trade Commission (ITC) made a ruling and declared that Apple had indeed infringed on a Samsung patent. Apple also has a history of lawsuits with Motorola (News - Alert).

In fact, in the midst of being sued, Apple is in a Washington, D.C. U.S. Court of Appeals for the Federal Circuit, looking to revive a lawsuit that it has against the Motorola Mobility Unit. According to the court’s website, arguments were presented this week in which Apple alleges that it was overcharged for standard cell phone technology in violation of FRAND guidelines.

FRAND stands for fair, reasonable and non-discrimination. It is a type of licensing for technology patents. Apple alleges that Motorola discriminates against the company in how much it charges it for the patented technology.

So you can see that this lawsuit by the two Swiss companies is just another day in court for Apple.