They have 34 assorted patents that they are using as an Argumentum Verbosium - Proof by intimidation. They make up hundreds of pages of legalese, there's no way a business can defend itself without spending tens of thousands on patent attorneys to examine those claims and cross-check them against the WiFi standards. Below are the 17 patents asserted against Holiday Inn, have fun. (Talk about "redundant" patents!)
6,714,559 “Redundant Radio Frequency Network Having A Roaming Terminal Communication Protocol.”
7,386,002 “Redundant Radio Frequency Network Having A Roaming Terminal Communication Protocol.”
7,535,921 “Redundant Radio Frequency Network Having A Roaming Terminal Communication Protocol.”
7,548,553 “Redundant Radio Frequency Network Having A Roaming Terminal Communication Protocol.”
5,740,366 “Communication Network Having Plurality Of Bridging Nodes Which Transmit A Beacon To Terminal Nodes In Power Saving State That It Has Messages Awaiting Delivery.”
5,940,771 “Network Supporting Roaming, Sleeping Terminals.”
6,374,311 “Communication Network Having A Plurality Of Bridging Nodes Which Transmit A Beacon To Terminal Nodes In Power Saving State That It Has Messages Awaiting Delivery.”
7,457,646 “Radio Frequency Local Area Network.”
5,546,397 “High Reliability Access Point For Wireless Local Area Network.”
5,844,893 “System For Coupling Host Computer Means With Base Transceiver Units On A Local Area Network.”
6,665,536 “Local Area Network Having Multiple Channel Wireless Access.”
6,697,415 “Spread Spectrum Transceiver Module Utilizing Multiple Mode Transmission.”
7,013,138 “Local Area Network Having Multiple Channel Wireless Access.”
7,710,907 “Local Area Network Having Multiple Channel Wireless Access.”
7,916,747 “Redundant Radio Frequency Network Having A Roaming Terminal Communication Protocol.”
7,873,343 “Communication Network Terminal With Sleep Capability.”
7,536,167 “Network Supporting Roaming, Sleeping Terminals.”