Patent ID: 7548213

Claim:
A game chip comprising: a circuit for receiving a data request from a read device and transmitting data in response to receiving a data request from the read device; an electromagnetic antenna connected to the circuit for receiving the request for data from the read device as an electromagnetic signal and for transmitting data; a body housing the circuit and the antenna; an annular protector located at and defining an outer periphery of the game chip and protecting the body; and an annular electromagnetic wave reflector located between the body and the protector, wherein, when a plurality of the game chips are arranged in a stack, each annular electromagnetic reflector of each game chip in the stack forms a part of a stack electromagnetic wave reflector of the stack, reflecting electromagnetic waves radiated by the read device at a first end of the stack, so the electromagnetic waves reach the game chip at a second end of the stack, opposite the first end of the stack, by reflection of the electromagnetic waves from the stack electromagnetic wave reflector of the stack, and each chip has a height along an axial direction of the stack of game chips.