The implication being that Apple set up Slate Computing, LLC as a dummy corporation to secretly acquire the iSlate trademark. Apple has been known to do this in the past. For example, the iPhone trademark was
originally filed by Ocean Telecom Services, another anonymous Delaware-based company.
In delving deeper, however, we have discovered evidence that Apple is indeed behind Slate Computing, LLC and the iSlate trademark.
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Exactly such a multi-touch "trackpad gadget" was
rumored in October. It's not clear if Apple is still planning on releasing such a device, but the name of "Magic Slate" would fit in nicely alongside the Magic Mouse.