Using AdSense with Google trademarks.
Thank you very much for answering this question.
Thank you for your email. Please note that publishers must first receive permission from Google before using any Google Brand Features, including Google trademarks, logos, or other distinctive features on their websites. You can read more about this policy at http://www.google.com/permissions/guidelines.html .
To request permission, you can visit http://www.google.com/permissions/request.html.
If you have not received permission, please do not place AdSense on any site which contains Google Brand Features. We appreciate your efforts to remain in compliance with our program policies.
For additional questions, we suggest you visit our AdSense Support site at https://www.google.com/support/adsense. If you're unable to find an answer to your question on our site, please feel free to reply to this email.
Sincerely,
The Google AdSense Team