as noted above: "We will implement the IPA later this year, and it will apply to all patents issued to our engineers, both past and present." [1] emphasis on

as noted above: "We will implement the IPA later this year, and it will apply to all patents issued to our engineers, both past and present." [1] emphasis on past [1] http://engineering.twitter.com/2012/04/introducing-innovators-patent-agreement.html http://engineering.twitter.com/2012/04/introducing-innovator...