While the dispute between Fujitsu and Apple centers on the United States, there are other iPads around the world. The German conglomerate Siemens uses the name for engines and motors, while a Canadian lingerie company, Coconut Grove Pads, has the right to market iPad padded bras.
Apple faced a similar spat three yeas ago with Cisco Systems over the iPhone name. The two companies eventually negotiated a settlement.
In addition, Google still cannot offer Gmail accounts under the Gmail name in Germany, because a small German company owns the name there (parodied a few years ago with Gmail Paper).
I'm under the impression that someone will claim the rights to all sorts of ordinary works with "i" and "e" slapped on as a prefix. When the products are obscure, defunct, in an unrelated industry, or not yet developed, the company releasing the new product shouldn't have to compensate the old copyright owner. Any attempt to do so seems like rent seeking at its worst.