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<p>[QUOTE=&quot;CVirtue, post: 11179240, member: 94253&quot;][The system seems to have eaten my reply; apologies if this is a duplicate.]</p><p><br /></p><p>Thanks for the additional information about these; I guess it will continue to be a mystery until someone finds a huge manufacturer&#039;s catalog in their grandparents&#039; effects some day.</p><p><br /></p><p>Random thought, possibly not new to people that have been following this: any chance there could be patents or copyright filed by the manufacturer for some part of this process?&nbsp; </p><p><br /></p><p>(Last month I spent some time in the US Patent online files to find more information about a spinning mechanical teakettle from the 1990s, so it&#039;s near the top of my mind.)[/QUOTE]</p><p><br /></p>

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