Everyday there seems to be a mobile manufacturer launch a new patent infringement case. It’s big business and companies spends hundreds of millions of dollars each year protecting their intellectual property. Just yesterday RIM was hit by WiLAN, and it was possibly revealed that Apple has already spent upwards of $100 Million in legal fees against HTC. Thankfully somebody has taken the time to make sense of some, not all, of the current cases. As you can see Apple seems to be on everyone’s radar – according to this chart they are involved in one way or another in 12 patent infringement cases, HTC has 5 and RIM has 4.