lexipixel - 6:09 am on Feb 15, 2012 (gmt 0)
A quick search of TESS (Trademark Electronic Search System) at the U.S. Patent and Trademark Office shows dozens of TM's for "ITV", "iTV", "Itv", etc.. (including the British Broadcasting trademark).
The same is true of iPAD. (I remember when an "IPAD" was an "Internet Protocol Adapter", invented by Phil Becker of eSoft/TBBS in the 90's)... That was long before Steve Jobs little gizmo...
I would bargain to say that a "device" called an iTV can exist and be tradmarked -- and NOT be confusingly similar to a "network" called ITV -- with enough money and lawyers, anything is possible.