"Ad Sense" Magazine, (1901)

Term may be copyrighted or public domain and not Google's to own...

[lexipixel]

If you notice, Google does not put trademark, registered trademark, salesmark of other legal claim next to the term "AdSense" when it uses the name of that product/service in print.

While searching for something else, I ran across a copy of the December 1901 issues of the magazine "Ad Sense" -- scanned into Google Books of all places!

[books.google.com...]

[sonjay]

I dunno, it looks to me like Google has it registered as a trademark:
[tess2.uspto.gov...]

(Edited because the search link expires)

[edited by: sonjay at 12:09 pm (utc) on Sep 24, 2010]

[Terabytes]

Don't trademarks only last for a specific period of time?

[sonjay]

Registrations issued on or after November 16, 1989 have a ten-year term, renewable every ten years.

See Trademark FAQs for more info:
[uspto.gov...]