Patent ID: 9733334
Date: 2017-08-15
CPC Classifications: G01S

Claim:
1. A system for locating objects using radio frequency identifiers, comprising: at least one object unit, each attached to an object to be located by a user and having an RFID transponder; a proximity unit to be carried by the user, having an RFID transponder and warning means; wherein the system is configured to repeatedly obtain, using signal strength RFID readings, information relating to a distance between the proximity unit and the object unit, the proximity unit being configured for, once obtaining said information regarding the distance to the object to be located, alerting the user through the warning means about the distance to the object to be located; a plurality of main intermediate units, each one associated with a location area and comprising an RFID reader; a controller in communication with the main intermediate units and configured for: a plurality of peripheral intermediate units, each one comprising an RFID transponder; and wherein the main intermediate unit associated with the location area of the object to be located is configured for: