Timing system and device and method for making the same

A timing device comprising:

• a. an electro-chemical structure comprising a solid-state electrolyte;
• and
• b. an indicator for indicating when an electrode material of the electrochemical structure is at least partially depleted provides a visual indication of a passage of a duration of time.

A method of making a timing device comprising:

• a. forming a first electrode structure on a first piece of a substrate;
• and
• b. forming a second electrode structure on a second piece of a substrate, wherein at least one of the first electrode structure and the second electrode structure comprises a solid-state electrolyte and wherein the first electrode structure and second electrode structure are configured to contact in a sandwich-like configuration and indicate passage of a duration of time.

A timing device comprising an electrochemical structure, the electrochemical structure comprising an electrolyte and electrodes in electrical communication with the electrolyte, wherein depletion of one or more of the electrodes provides an indication of a passage of a duration of time, further wherein the electrochemical structure is divided into zones configured to change color at different rates to collectively provide a visual indication of the passage of the duration of time.

A timing device comprising an electrochemical structure, the electrochemical structure comprising an electrolyte and electrodes in electrical communication with the electrolyte, wherein depletion of one or more of the electrodes provides an indication of a passage of a duration of time, further wherein the electrochemical structure is divided into zones that collectively provide a visual indication of the passage of the duration of time, wherein each of the zones comprise different materials.

A system for managing food inventories, the system comprising:

• a. a lens, a base, a middle layer, an altering mechanism for altering the transparency of the middle layer, an actuator to actuate the system and an attachment mechanism for attaching the lens, the base, the middle layer, the altering mechanism, and the actuator to an article;
• wherein the transparency of the middle layer is altered to make the base more or less visible through the lens and further, wherein the altering mechanism is inversely sensitive to temperature after actuation.