Valuate.com ,the domain name appraisal tool has recently added a trademark checker .
For example,you can try searching googleads.com or iphonestore.com and an "x" will appear in the left column.The message that will appear when you try to search googleads.com will be : "exact trademark issue with APPLE on the term "iphone." Probablility 100%. Risk 10/10"."
Francois Carrillo,Domaining.com’s founder said that there are other things you should remember when you are trying to use the trademark checker :
EVERY word is trademarked (ex: apple, orange, great, elephant) so it’s pointless to have a TM scanner that checks every TM because 99% of domains will have some generic TM.
TM checker only works on BIG Fortune 1,000 companies + their products (ex: Microsoft => xbox => halo) + smaller industry companies (ex: Verisign, GoDaddy).
TM checker is optimized for companies that have a history of suing domainers (ex: Verizon, Viacom, Facebook, Twitter, etc).
It’s NOT a comprehensive TM check. Always consult a good TM lawyer for real analysis. It’s only good for identifying obvious TMs in a portfolio.
It detects typos. You can adjust the probability match (default is 65%, but you can lower it to 30% to make the search very broad).