Apple has urged a US judge hearing the second patent-infringement lawsuit against Samsung to force Google to provide documents related to its Android operating system.
Bloomberg reported that Apple told US Magistrate Judge Paul Grewal in San Jose, California about Google's move which is improperly withholding information.
According to a court filing, Apple argues that Android is used in all of the South Korean firm's allegedly infringing products and "provides much of the accused functionality" in its claims.
Apple's lawyer Mark Lyon was quoted by Bloomberg as saying that "It's a question of transparency. We have concerns that they're not doing a full search."
Google's lawyer Matthew Warren, who also represents Samsung, said that Apple made a strategic decision in filing its case to keep Google off the complaint.
Warren said as a third-party to the case Google doesn't have the same legal rights that Apple and Samsung have, in particular with respect to "reciprocal discovery."
Samsung got support from Google, HTC, Red Hat, and Rackspace, who filed friends of the court briefs on behalf of the South Korean firm asking the US Federal Court of Appeals to rule against Apple's request for a Android device sales ban in both the firm's ongoing patent infringement battle.