For an earlier generation, one of the sweetest sounds of summer was the music coming from an ice-cream truck. For the next generation, will it be the tune of a delivery drone?
That’s just one of the possibilities covered in a patent issued to Amazon today: It addresses methods by which a drone could signal its approach, as well as techniques for signaling back.
The application was filed by a group of Seattle-area inventors on Amazon’s behalf almost two years ago.
