Full Tilt invented fast fold poker over two years ago. Now that it is back in business, its new owner is preparing to defend its patents. That could spell trouble for everyone else.

Until now the online gaming industry has been a relatively gentlemanly competition. Unlike in the US, where land-based slot and systems manufacturers such as Bally and IGT engage regularly in patent warfare, the online gaming industry has generally avoided court confrontations with its rivals.

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