|bgcolor = "#808080"|<font color="#CCFFFF">'''Patent number'''</font>
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|align = "justify"|<font size="1">'''1.''' A central system has limited visibility of containers in the global supply chain<br>'''2. '''Drawback of the central system is the delay in alerts concerning the container<br>'''3. '''Typical central systems have difficulty in collecting reliable information across heterogeneous systems<br></font>|align = "justify"|<font size="1">A decentralized state system comprising containers to automatically provide continuous and uniform monitoring of a container state is needed. A container should be robustly configured with localized logic capable of determining a state in response to real-time events experienced by the container relative to dynamic and static event information concerning expected events<br>State determinations made through local information are more reliable to typical prior art systems that use central systems to make inferences about the security state</font>|<font size="1">US20040246130<br></font>
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|align = "justify"|<font size="1">'''1.''' A major disadvantage of all transponder based tag designs is the special anti-collision method used<br>'''2. '''A short range reader must be used to individually address each tag within the larger field<br>'''3. '''A second major disadvantage is that to obtain long ranges (100-1,000 feet), higher frequencies are required and these lead to high power consumption<br></font>|align = "justify"|<font size="1">'''1. & 2.''' By using lower frequencies (not exceeding 1 MHz and typically under 300 KHz) and a base station design that uses large loop antennas (such as 10.times.10 feet to 500.times.500 feet) and by transmitting a digital ID to selectively activate a selected client tag, rather than a non-selective signal which would activate many tags simultaneously<br>'''3.''' Networked RF Tags (NRF Tags) have significantly reduced power consumption and long range (1000 sq feet to 10,000 sq feet per antenna), have the power capacity to add displays (e.g. LCD) and light emitting diodes (LED<nowiki>’</nowiki>s) and detectors and buttons so they may become fully interactive "tag clients" (this is not possible with transponder)</font>|<font size="1">US20040201454<br></font>
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|align = "justify"|<font size="1">'''1.''' One drawback of these systems is that they require the goods to be passed through designated gateway areas, typically causing great inconvenience<br>'''2. '''Another drawback is that it is not possible to track the location of the goods within the warehouse<br></font>|align = "justify"|<font size="1">'''1. '''Each ID tag is coupled to an asset and is configured to wirelessly communicate with other ID tags in the network within a predetermined proximity<br>'''2.''' Each tag is also configured to relay communications from other ID tags so that a communication path is established between the RMS and any ID tag in the network, either directly or via other ID tags</font>|<font size="1">US20040174260<br></font>
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