Patent ID: 9221273
Filing Date: 2015-12-29
Classification: B41J,B42D,B44F

Abstract:
1. An identification system, comprising: a first ink comprising a time-dependent property; and a second ink comprising a time-dependent property; the first ink and second ink being disposed in a spatial pattern on a substrate; wherein the time-dependent properties of the first and second inks cause a characteristic of the spatial pattern to change from a first state at a first time to a second state at a second time, wherein interpretation of the characteristic of the spatial pattern in the second state provides identifying information about a product, and wherein a characteristic of the first ink changes from a third state at the first time to a fourth state at the second time, and a characteristic of the second ink changes from a fifth state at the first time to a sixth state at the second time, wherein the first ink comprises known time- and temperature-dependent properties such that interpretation of the first ink in the fourth state provides information about the temperature of the first ink between the first time and the second time.