Both Jay-Z and Beyonce have made headlines this week for their respective appearances at Carnegie Hall -- Hov ripped through his hits at the venue for charity. Now the entertainers are putting the performance aspect of their careers aside to focus on a legal matter: trademarking their daughter's name.

The Washington Post reports that the power couple have filed an application with the U.S. Patent and Trademark Office to protect Blue Ivy's name. The trademark will reserve her name for future use of items like "baby carriages, baby cosmetics and diaper bags."

While most parents don't run to get their child's name trademarked, the rap star and the R&B singer were likely prompted to do so after fashion designer Joseph Mbeh submitted an application to trademark "Blue Ivy Carter NYC" on Jan. 11 -- four days after Blue Ivy's birth.

On Jan. 20, another application for "Blue Ivy Carter Glory IV" was submitted, this time to be used to sell a line of fragrances. Both filings have since been denied. Officials have said since the name belongs to a "very famous infant" that consumers would falsely assume any products with her name were approved by the celebrity parents.

Beyonce's company, BGK Trademark Holdings, is listed on the current application to patent Blue Ivy's name. The filing is still pending, however, the newspaper reports that it should be approved due to parents' having legal authorization to trademark the names of their minor children.

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