Match Group, the company that holds a large portfolio of dating services, such as Tinder, Match.com, OkCupid, PlentyOfFish, to name a few, and was in talks last year to purchase dating and professional networking service Bumble. According to Recode, Match is still looking to acquire the service, but it’s going about it in an unconventional way: by suing it for patent infringement.

On Friday, Match filed a lawsuit that accuses Bumble of infringing on a pair of patents held by Tinder: one called “Matching Process System and Method,” in which users swipe cards and mutually select one another, as well as “Display Screen or Portion Thereof With a Graphical User Interface of a Mobile Device,” which it describes as an “ornamental aspect” of Tinder’s App. The lawsuit also points to similarities between each companies’ apps, and Bumble’s descriptions of “swiping” run afoul of Tinder’s registered trademarks.

In a statement to Recode, a Match spokesperson said that the company has “invested significant resources and creative expertise in the development” in its products, and was working to enforce its property rights.

Last November, TechCrunch reported that Bumble had turned down the $450 million offer, but that talks were still ongoing, which could leverage for Match to encourage Bumble to join its portfolio: accept the buyout, and the lawsuit goes away.