Inventory system and methods of using the same

A method comprising:

• providing a system that includes;
• a tagged inventory item, wherein the tagged inventory item includes a radio field tag attached to an inventory item;
• and
• an inventory device, wherein the inventory device includes a weighing surface, an array of force sensing resistors, and at least one radio field antenna, wherein the inventory device includes a top, a bottom, and a side, wherein the top of the inventory device includes the weighing surface;
• wherein the array of force sensing resistors and the at least one radio field antenna are configured to weigh and identify the tagged inventory item through the weighing surface;
• wherein the weighing surface includes a flexible material, wherein the top, the bottom, the side, and the weighing surface of the inventory device are resistant to the passage of water;
• detecting a weight change of from about 25.0 g to about 45.0 kg when the tagged inventory item is placed into contact with the weighing surface of the inventory device;
• measuring a weight of the tagged inventory item;
• and
• identifying the tagged inventory item by turning on the at least one radio field antenna.

A system comprising:

• a tagged inventory item, wherein the tagged inventory item includes a radio field tag attached to an inventory item,
• wherein the radio field tag includes an item adhesive layer, a concentrating layer, and an integrated circuit layer;
• wherein the concentrating layer is in contact with and located between the item adhesive layer and the integrated circuit layer;
• and
• wherein the concentrating layer includes a radio enhancing material,
• wherein the radio enhancing material includes a solid foam, a polystyrene foam, a foam rubber, a silicone foam, a polyurethane foam, or combinations thereof;
• and
• an inventory device, wherein the inventory device includes a weighing surface, an array of force sensing resistors, and at least one radio field antenna,
• wherein the inventory device includes a top and a bottom, wherein the top of the inventory device includes the weighing surface, wherein the weighing surface includes a flexible material;
• wherein the array of force sensing resistors is positioned between the weighing surface and the at least one radio field antenna;
• and
• wherein the array of force sensing resistors and the at least one radio field antenna are configured to weigh and identify the tagged inventory item through the weighing surface.