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-One of the conditions for all uses is that you can't mess around with our marks. Only we get to do that. Don’t remove, distort or alter any element of a Google Brand Feature. That includes modifying a Google trademark, for example, through hyphenation, combination or abbreviation, such as: Googliscious, Googlyoogly, GaGooglemania. Do not shorten, abbreviate, or create acronyms out of Google trademarks.
-Don’t register Google trademarks as second-level domain names.
-Don’t incorporate Google Brand Features into your own product name, service names, trademarks, logos, or company names.
ที่มา
http://www.google.com/permissions/guidelines.html 
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