Google’s chief legal officer David Drummond has hit out at Apple, Microsoft and Oracle for pursuing “bogus” patent claims, reports Corporate Counsel.

In an Google blog post entitled ‘When patents attack Android‘, Drummond writes that the success of Android, Google’s smartphone operating system, has prompted rivals Microsoft and Apple “to get into bed together” to purchase smartphone patents and has inspired a “hostile, organised campaign against Android by Microsoft, Oracle, Apple and other companies, waged through bogus patents.”