We’ve all lost pens and pencils before. It’s annoying when it happens, but they’re easily replaceable, so you don’t give it much thought. But losing an Apple Pencil? That’s a real pain. Not only is it a specialized, unique utensil—it’s costly, too. A recent patent application by Apple hopes to save users from that aggravation. Patently Apple reports on U.S. patent 20230161545, which describes how acoustic resonators can be used in the Apple Pencil so it can alert a
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