When I specifically asked Ken about this a few years ago, he told me that "Powered by xxx" is regulated by trademark laws. And that you can NOT write Powered by Visual FoxPro without a written agreement, because then you are violating the copyright laws.
>There is this one on the Wiki
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http://fox.wikis.com/wc.dll?Wiki~PoweredByVisualFoxPro~VFP>
>Havn't seen the one you pointed to before, but I recall Ken L saying that the VFP9 Box artwork could be used, and this looks like that with embelishment, but that is just my opinion, not legal advise.
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>>Hi all
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>>I just recently found a logo that can be put in an application 'Certified Visual FoxPro Evangelist'. Is this usable in copyright terms?
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http://weblogs.foxite.com/kkchan/archive/2006/09/28/2540.aspx