There is plenty of prior art out there. If the prior art doesn't show everything, you show the missing part is obvious. Although, I really don't think obviousness is necessary in this case. Even the PTO has rejected this claim. Apple is not going to to get this broad claim. They will have to narrow in their response to the current rejection.

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That way there is no doubt as to the outcome.

On finding prior art, see Peer to Patents' Tutorials, A Prior Art How To; and PubPat's Prior Art Tutorial.

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