I've read the patent and it looks to me like the client-side component although a key part of the introductory text is later described as a "preferred embodiment". I'm no lawyer but that suggests to me that there may be other ways of delivering alternative error pages that don't require a client-side component.
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I've read the patent and it looks to me like the client-side component although a key part of the introductory text is later described as a "preferred embodiment". I'm no lawyer but that suggests to me that there may be other ways of delivering alternative error pages that don't require a client-side component.