Patent ID: 8102244
Filing Date: 2012-01-24
Classification: G06K,G08B

Abstract:
1. A method for identifying tags, the method comprising: issuing a first set of commands to identify a first plurality of tags in a first state, wherein, as a result of identifying the first plurality of tags in the first state, the first plurality of tags which are identified in the first state are placed in a second state; and issuing a second set of commands to identify a second plurality of tags in the second state, wherein, as a result of identifying the second plurality of tags in the second state, the second plurality of tags which are identified in the second state are placed in the first state, wherein at least one of the first set of commands that contains a first parameter associated with the first state causes the first plurality of tags to perform an operation that is identical to the operation performed by the second plurality of tags in response to at least one of the second set of commands that contains a second parameter associated with the second state, wherein the first state and the second state are not the same.