Abstract: A new passive radio frequency identification (RFID) system to authenticate, identify, and sum currency amounts is described. The inventive device includes (1) a paper-like passive RFID transponder which could be embedded in a currency or used as the currency itself, and which contains encrypted/non-encrypted electronic bits of data (serial number, currency amounts, etc.) to uniquely identify said currency, (2) a transceiver for wireless interrogation of the transponder, (3) a computer server and/or database management system that is used for currency authentication to a known currency information database. The passive RFID transponder is paper-like, robust, and could be printed as a currency, or embedded in a currency. The transceiver sends an electromagnetic signal, which is picked up by the passive transponder in the currency.

Abstract: A new radio frequency identification (RFID) system identifying and locating golf balls in golf courses and driving ranges is described. The inventive device includes (1) golf balls each containing a passive RFID transponder with electronic bits of data (serial number) to uniquely identify said ball, (2) a wireless and/or wired grid of strategically located transceivers to transmit and receive electromagnetic signals to and from the passive transponder from said ball, (3) a computer server and/or database management system that maintains communication with the grid of transceivers and a database of the locations of golf balls and along with the number of golf strokes, and (4) hand held personal data assistant (PDA) for wireless communication with the computer server and/or database management system. The passive transponder, which has a very small mass and volume, is embedded in a golf ball.