It, as they say, is on. Google's with a post not-so-subtly-titled "When patents attack Android," which directly addresses what he calls a "hostile, organized campaign against Android by Microsoft, Oracle, Apple and other companies, waged through bogus patents." Drummond then goes on to cite a number of examples of this "organized campaign" from those trying to "strangle" Android, including Apple and Microsoft teaming up to buy Novell and Nortel's old patents "to make sure Google didn't get them," Microsoft seeking $15 licensing fees for each Android device, and lawsuits against the likes of Barnes & Noble, HTC, Motorola, and Samsung.

According to Drummond, those efforts amount to a "tax" that makes Android devices more expensive for consumers and manufacturers alike, and that "instead of competing by building new features or devices, they are fighting through litigation." He further goes on to bemoan the "anti-competitive strategy" that's "escalating the cost of patents way beyond what they're really worth," and closes things out by noting that he's encouraged by Justice Department investigations into the aforementioned Novell and Nortel patent issues. Hit the source link to read the full post yourself.

Update: And now, shots have been fired from both sides. Brad Smith, Microsoft's General Counsel, has shot off the following tweet: "Google says we bought Novell patents to keep them from Google. Really? We asked them to bid jointly with us. They said no." We're guessing the truth lies somewhere in between, as it always does.

Update 2: Hoo boy! The hits just keep comin' out of Redmond. Frank Shaw, lead corporate communications for Microsoft has just tweeted an image of an email between Brad Smith and Kent Walker (Google's General Counsel) that appears to corroborate the claims that Microsoft wanted to team up with El Goog.