One of the security checks that failed to catch the mock device was a pat-down.

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The launch of the iPad will speed up this experimentation, but it is not the only device to catch publishers' attention.

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His device is quirky -- a patented handle-and-catch that automatically lifts a toilet seat -- but his dilemma is common.

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Meanwhile, the device is also being attached to fishing nets to prevent sharks stealing fishermen's catch.

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