The Patent Troll going by the name 'Prowire LLC' had acquired a patent from Taiwan for the sole purpose of suing profitable high profile companies like Apple, and not to make a product of any kind. Prowire claims that Apple's iPad 4 infringes on their acquired patent relating to inductors. 

The acquired patent notes in its background that "Inductors are considered one of the most common devices in the electronic/electric industry." And yet somehow, even though Apple owns IP covering inductors that work in their patented iDevices, Prowire believes that Apple had to steal or infringe their acquired invention from Taiwan to make an iPad run right.

Sarcasm aside, Prowire's patent infringement lawsuit is based on October 20004U.S. patent 6,137,390 titled "Inductors with minimized EMI effect and the method of manufacturing the same." The patent, as noted below, was originally assigned to Industrial Technology Research Institute in Taiwan and invented by two Taiwanese citizens.

Prowire states in their complaint before the court, that the iPad 4 infringes on at least claim 1 of their patent that states the following: An inductor with enhanced inductance comprising: (a) a magnetic core; (b) an electrically conducting coil wound about said magnetic core; (c) a magnetic resin layer compression-molded to embed at least a portion of an outer periphery of said electrically conducting coil; and (d) wherein said magnetic resin layer contains a magnetic powder dispersed in a polymer resin.

Prowire claims in their filing specifically that "The inductors used in Defendant's consumer electronics products including, for example and without limitation, its line of iPad 4 tablet computers, meet each and every element of at least claim 1 of the patent-in-suit.  The inductors used in Defendant's iPad 4 tablet computers contain an electrically conducting coil wound about said magnetic core.

The magnetic resin layer contained in the inductors used in Defendant's iPad 4 tablet computers contains a magnetic powder dispersed in a polymer resin.

Prowire reserves the right to amend to assert a claim of willful infringement if the evidence obtained in discovery supports such assertion."

Source: patentlyapple