Google is trying to register the word “Glass” as a trademark for its computer-powered glasses. But so far, the company and the U.S. trademark office aren’t seeing eye to eye. Google, which has successfully trademarked the term “Google Glass,” submitted an application last year for a trademark on just the single word “Glass,” displayed with the same futuristic font used in its marketing campaign. But the U.S. Patent and Trademark Office is holding up the company’s bid. In a letter to the company last fall, a trademark examiner raised two main objections. One concern was that the trademark was too similar to other existing or pending computer software trademarks that contain the word “glass,” creating a risk of consumer confusion. The examiner also suggested that “Glass” — even with its distinctive formatting — is “merely descriptive.”