The British company Quantum Research Group has sued Apple, accusing it of illegally using capacitive sensing technology. According to Hal Philipp (Hal Philipp), Executive Director of Quantum Research Group, the technology has been applied to create the Click Wheel scroll wheel in the iPod.
According to
Ars Technica , the lawsuit, oddly enough, was filed more than a year ago - in December 2005 - but it became known about him only now, and Apple's answer was the reason for this. The company, of course, did not admit its guilt and filed a retaliatory claim against Quantum, demanding to drop the charges.