Electronic publishing services, namely, publication of text and graphic works of others in the field of general encyclopedic knowledge; providing education, entertainment and information services, namely, providing information via the Internet in the field of general encyclopedic knowledge.
Google trademarked Knol back in the day (2007). A USPTO search shows it is still live:
http://tmsearch.uspto.gov/bin/showfield?f=doc&state=4809:9wz...
Electronic publishing services, namely, publication of text and graphic works of others in the field of general encyclopedic knowledge; providing education, entertainment and information services, namely, providing information via the Internet in the field of general encyclopedic knowledge.