Inventory control system

CAFC
  • US 6,967,563 B2
  • Filed: 04/08/2002
  • Issued: 11/22/2005
  • Est. Priority Date: 06/11/1999
  • Status: Expired due to Fees
First Claim
Patent Images

1. An inventory control apparatus comprising:

  • a computer including;

    a list implemented therein comprising;

    a unique item identifier for each item in an inventory;

    a unique item code; and

    an item status;

    an anti-collision, field activated apparatus affixed to each item in the inventory including a programmable memory storing its unique item code, a transmitter, anti-collision hardware and software and an antenna; and

    an interrogator/reader in communication with the computer and including;

    a field generator capable of generating a field having a range characterized by a radius centered at the generator and a field strength sufficient to activate any field activated apparatus affixed to an item within the range of the generated field; and

    a receiver,where each anti-collision, field activated apparatus affixed to an item of inventory within the range of the generated field periodically transmits a signal including its unique item code only when anti-collision hardware and software of each anti-collision, field activated apparatus determines that no other anti-collision, field activated apparatus is transmitting its periodic signal and where the status of each item whose field activated apparatus has transmitted its signal to the receiver of the interrogator/reader is set to a first state indicating that the item is inside the range of the generated field, while the status of all other items is set to a second state indicating that the all other items are outside of the range of the generated field.

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