They will. From the announcement (http://engineering.twitter.com/2012/04/introducing-innovators-patent-agreement.html http://engineering.twitter.com/2012/04/int

They will. From the announcement (http://engineering.twitter.com/2012/04/introducing-innovators-patent-agreement.html http://engineering.twitter.com/2012/04/introducing-innovator...): > We will implement the IPA later this year, and it will apply to all patents issued to our engineers, both past and present.