Patent ID: 7918455

Claim:
A chip having a generally disk shape, comprising: a body having a central aperture; an insert, positionable within the central aperture, comprising two rigid plates each having at least one central projection extending from a respective inside face and a contactless identification device, wherein the at least one central projection of each of the two rigid plates are coupleable to the respective opposing inside face of the rigid plate to define an area in which the contactless identification device is located, wherein the two rigid plates further comprises a first rigid plate having a first central projection and a first central cavity on its inside face and a second rigid plate having a second central projection and a first groove on its inside face, wherein the first central cavity is configured to receive the second projection of the second plate and the first groove is configured to receive the first projection of the first rigid plate, and wherein the first projection and the first groove are annular in shape and wherein the first central cavity is sized to receive the second projection such that at least a portion of the interior wall of the first projection substantially abuts at least a portion of the corresponding facing wall of the second projection.