Electromagnetic state sensing devices

Abstract

A container includes a surface and an electromagnetic state sensing device including one or more resonance portions printed on the surface of the container. Each resonance portion may include an assembly of 3D carbon-containing structures that convey information of a stored item by resonating at a predetermined frequency in response to an electromagnetic radiation ping received from a user device. The resonance portions may include at least a first resonance portion configured to convey product identification information of the stored item and a second resonance portion configured to convey product state information of the stored item. The first resonance portion conveys product identification information of the stored item in response to a first electromagnetic radiation ping having a first frequency, and the second resonance portion conveys product state information of the stored item in response to a second electromagnetic radiation ping having a second frequency different than the first frequency.

Dependencies are inferred from the claim text.