The mood rings you used to buy at the dollar store had a heat-sensitive dye that changed hues based on your skin temperature. Michael Fisher wears an RFID chip-equipped Sesame Ring so he can punch tap terminals to pay for public transit. Apple might want to put a ring on its show floors sooner or later.
And maybe Samsung will, too. Patents filed in June and published this month are showing off a “wearable device (the ring)” that interacts with a “portable terminal” (a smartphone, a tablet, etc.) and allows the user interface with the terminal and possibly [...]