Motorola's own patent war against Apple rages on, as the company has filed a new lawsuit in the US targeting Apple's iPhone 4S and iCloud service. Motorola's new lawsuit, filed in the US District Court of Southern Florida, asserts six patents against the iPhone 4S, with four of those same patents asserted against iCloud. This suit comes several months after two other federal lawsuits filed by Motorola against Apple, rounding out the list of Apple products that Motorola is going after with its patent portfolio.

The four patents Motorola is claiming against iCloud (hat tip to FOSS Patents for rounding them all up) include one for "multiple pager status synchronization," one that describes a "method and apparatus for communicating summarized data," a "system for communicating user-selected criteria filter prepared at wireless client to communication server for filtering data transferred from host to said wireless client," and a "method and apparatus in a wireless messaging system for facilitating an exchange of address information."

The patents being claimed against the iPhone 4S are all of the above, plus another patent for a "receiver having concealed external antenna," and an "apparatus for controlling utilization of software added to a portable communication device." Overall, it appears that Motorola is targeting iCloud and the iPhone 4S for being able to sync data stored on the iPhone wirelessly (via concealed external antenna, that is).

Motorola had originally attempted to add these claims to its ongoing lawsuit from 2010 that targets Apple's older hardware, iOS, MobileMe, and App Store. The company was rebuffed by the judge in that case, however, who said Motorola should assert the alleged infringements of the iPhone 4S and iCloud in a new lawsuit.

While the suit's arrival is not a huge surprise, it shows that Motorola is indeed still committed to fighting Apple along with HTC and Samsung. Apple hasn't been winning much lately against Motorola either—in December of 2011, Motorola won an injunction against Apple in Germany that could potentially bar Apple's European sales arm from selling iPhones and 3G-equipped iPads. Earlier this month, the International Trade Commission handed Motorola an early win by saying that Motorola didn't violate three of Apple's smartphone patents. A trial for Motorola's original suit is already on the calendar for this summer, so we'll soon find out whether US courts feel the same way as those in Germany and at the ITC.