Abstract: A wirelessly readable bolt seal assembly including a seal portion including an wireless communication module located within a housing, a pin portion including a shaft, the pin portion being fixedly connected to the wireless communication module and a cap portion arranged for selectable and non-removable mechanical and wirelessly readable locking engagement with the pin portion, the seal portion and the cap portion being cooperative to provide a wirelessly readable locking indication to a remote receiver upon non-removable locking engagement of the seal portion and the cap portion and thereafter.

Abstract: A very low power receiver and a transmitter are integrated on one silicon chip, thereby achieving a significant miniaturization of the tag with a long life time, and at the same time offering a significant reduction in unit price, despite requiring the use of a battery. The use of a backup battery helps overcome the range problem, the high cost of the reader, and the environmental problems associated with the emission of very strong magnetic fields.

Abstract: An electronic seal including an electronic tag, an electrically resistive element in electrical communication with and attached to the tag, the resistive element being bondable to an object so as to define an electrical resistance, wherein a change in bonding of the element to the object causes a change in the electrical resistance, the change in electrical resistance being communicated to the tag.