Patent ID: 7726578

Claim:
A card body comprising: a first card body having a first shape with a first perimeter comprising a first plurality of sides, a second card body having a second shape with a second perimeter comprising a second plurality of sides, the first card body encompassing the second card body, a first boundary separating the first shape from the second shape, the first boundary comprising a first number of apertures and a first number of notches defining a first mechanical inter-card body coupling strength, a third card body having a third shape with a third perimeter comprising a third plurality of sides, the second card body encompassing the third card body, the third card body having a cavity for receiving an electronic module, a second boundary separating the second shape from the third shape, the second boundary comprising a second number of apertures and a second number of notches defining a second mechanical inter-card body coupling strength, wherein a cumulated length of the first number of apertures is greater than a cumulated length of the second number of apertures and a cumulated length of the first number of notches is less than a cumulated length of the second number of notches such that the second mechanical coupling strength is greater than the first mechanical coupling strength, and wherein none of the second plurality of sides of the second perimeter share a common side with any of the first plurality of sides of the first perimeter, and wherein none of the third plurality of sides of the third perimeter share a common side with any of the second plurality of sides of the second perimeter.