On April 27, 2012, in response to Facebook's counterclaim, Yahoo! asserted two additional advertising patents against Facebook. Yahoo! also asked for invalidation of the asserted Facebook patents, and claimed most of the patents were bought from non-operating entities for the purpose of retaliation. Both parties may be interested in knowing that neither was the first to the online advertising race, as there are thousands of patents, with tens of thousands of similar claims, that overlap Yahoo!’s recent patent assertions.