Another Apple patent: Use your mobile device to locate keys via Bluetooth

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If this newly patented idea actually makes it to products (which many Apple products don’t), you’ll be able to locate your keys with a very simple "you’re getting hotter" or "you’re getting colder" method.

And this doesn’t just apply to your keys – it applies to your bluetooth headset as well.

Although these are the only 2 distinctly mentioned items in the patent, I’m sure the same method could be used to locate anything by simply sticking a small receiver on the frequently-losable-item (i.e. your child).