Samsung Galaxy S4-Google Now 2

It looks like Apple's Cold War against Google may finally be heating up. Apple typically targets Samsung and other smartphone manufacturers that rely on Android software with its patent infringement claims. Now, however, the Cupertino-based company may finally have Google in its crosshairs with a claim that the Google Now voice controlled search service infringes on two patents related to Siri.

Apple's ongoing battle with Google over claims that Android is a copy of iOS has largely played out between Apple and Samsung, particularly during a high profile court case last year where a California judge ordered the South Korean company to pay more than $1 billion in damages. Earlier this month, Apple asked the courts to add the Galaxy S4 to the list of infringing devices in an attempt to block sales of the new handset.

Today, Apple filed a new motion, pointing to five patents the S4 infringes on as well as two Siri-related patents which the company claims Google Now infringes on. Here's an excerpt from Apple's latest filing:

To further complicate matters, Apple's infringement analysis of the '604 and '959 patents focuses on Google functionality that Samsung incorporates into its devices. For example, in its original contentions, Apple identified Google's "Quick Search Box" found on the accused Samsung phones as satisfying the limitations of the '604 and the '959 patents. Since Apple initially served those infringement contentions, however, Google released the Google Now search application, which,in some instances, replaces the Quick Search Box, but incorporates the relevant '604 and '959 patented functionality. Google did not begin production of the source code for this application until at least the beginning of April.

Another trial between Apple and Samsung is scheduled for spring 2014, and Apple has agreed to remove one of the 22 devices it claims infringes on the company's intellectual property in order to add the S4 to the list.