Stanford University is a legendary breeding ground for startups — Silicon Valley giants Google Inc., Yahoo Inc., and Cisco Systems Inc. all came out of the Palo Alto, Calif., institution’s computer science and engineering departments.

Now, Stanford Law School is getting in on the action. In the last four years, the school has become a hotbed of entrepreneurship in the field of legal technology. Since 2009, at least five startups have spun out of the school. The first was Lex Machina, a company that maps electronically available patent litigation events and outcomes to build a litigation database.