Abstract: In one embodiment, an assembly includes: a body having a generally cylindrical shape encompassing an internal cavity extending from a first end of the body towards a second end of the body; and a radio frequency identification (RFID) transponder positioned within the internal cavity. The assembly may be inserted into an opening made in an object in order to affix the RFID transponder to the object.

Abstract: Systems and methods are disclosed for RFID (radio frequency identifier) tags with transponders secured within housings without potting elements using one or more components located at edges of cavities for the housings. For certain embodiments, an RFID transponder is positioned within a cavity formed in a housing for an RFID tag, and regions at the edge of the cavity are deformed using heat treatment to secure the RFID transponder within the housing. For certain embodiments, click pins are used to secure the RFID transponder within the housing. Once secured, an adhesive is used to attach the resulting RFID tag to the surface of an object. Preferably, the adhesive fills at least a portion of the cavity surrounding the RFID transponder during this attachment process. Tamper resistant solutions are also disclosed.

Abstract: Gas cylinder and RFID (radio frequency identification) transponder assemblies and related methods are disclosed that utilize fixed orientations for RFID transponders to overcome problems existing with previous solutions. The disclosed embodiments provide an advantageous solution for utilizing metal plates, such as metal identification plates, to house RFID transponders and to fix the orientation of the RFID transponders to overcame the adverse effects of metal structures distorting the magnetic fields associated with gas cylinders. This fixed orientation combined with a transponder embodying a copper wire antenna wound around a longitudinal axis of a ferrite core and the use of PSK (phase shift keying) modulation allows for adequate reader performance despite the presence of interfering metal structures such as a metal plate used to house an RFID transponder.

Abstract: Embedded RFID (radio frequency identification) tags for objects or containers and related systems and methods are disclosed that overcome problems existing with previous RFID tags. The RFID tags are embedded within recesses within the outer surfaces of objects or containers, such as within a metal valve flange for a metal container. The RFID tags can also be shaped and configured to fit within recesses so that the top surfaces of the RFID tags match the outer surfaces of the objects or containers. The embedded RFID tags can also be painted or otherwise disguised so that they are more difficult to identify. In addition, the RFID tags are preferably tamper resistant and can also use PSK (phase shift key) modulation. The embedded RFID tags described herein are particularly useful for tracking of liquid propane gas (LPG) containers and/or other types of containers or objects for holding hazardous materials.