There was a time when patents represented innovation. Thanks to the relaxing of patent rules as championed by the US patent office in a blatant attempt to curry favour with dubious business interests, and make a bit of money at the same time, those days are gone. These days, patents are a tool for those who have no business model other than litigation, either because their primary business model failed, or by design because filing patents and hoping a lawsuit or three will stick (or rather, be settled out of court) is easier than actually building something good.
Important: the subject matter and parties involved with this legal issue are deliberately not mentioned here; if you are aware of their identities, I ask you not to mention them publicly here in comments, or anywhere else. As some of you are already aware, over the last few months there has been an ongoing legal issue with a 3rd party having allegedly used OGRE code without respecting the license conditions. I hate getting involved in legal disputes, there are so many more useful things to do with time, money, and emotional energy, but nevertheless as custodian of OGRE it falls to me and my company to take charge of situations like this, however reluctantly.