In the carefully watched design patent battle between Apple and Samsung, the Supreme Court unanimously ruled yesterday that Samsung may not be liable for its entire $399 million in profits after copying the iPhone’s distinctive look, including its rectangular front face, rounded corners and grid of icons. In 2012, a jury decided that Samsung had infringed on Apple’s patents. “Design patents, which address what products look like, are far less common than utility patents, which cover how products work,” explains The New York Times. “The Supreme Court’s opinion, while not decisively resolving the case, found that liability in design patent cases is not necessarily an all-or-nothing proposition.” The two companies will return to court to determine an appropriate amount for damages.