Google Has Nexus One Trademark Rejected

Google's tough luck with the Nexus One continued last week.  After reports of disappointing sales in the smartphone, Google learned that its trademark for Nexus One was denied by the USPTO. The mark was denied because of a "likelihood of confusion" with a previously registered mark. The mark at issue was Nexus owned by Integra Telecom Holdings, Inc., which used the mark to provide telecommunication services in the oil industry.  Google has a right to appeal the decision or seek out an agreement with Integra.

You should conduct a thorough search in your potential name.  Otherwise, you will invest a ton of time and money in a trademark and not even be able to use it.