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>"Habeas' patent-pending service works by trademarking and >copyrighting a unique set of lines, known as the warrant mark, which >is embedded in the headers of outgoing email. Included is a haiku, a >17-syllable Japanese poem. >Copyright offers legal protection to the poetry. Trademark offers >legal protection to other parts of the email header." I remember a similar trademark-based scheme being proposed several years ago, and as I remember it the conclusion was that trademark law could not be used to prevent interoperability. For example, Apple couldn't prevent you ataching non-apple drives to Macs by making the connector pins be a trademarked apple shape. I don't remember whether copyright was considered. -- Richard
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