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

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).