Mealey's (April 28, 2020, 1:11 PM EDT) -- ALEXANDRIA, Va. — Although acknowledging that its patent and a prior art patent “at a very high level of abstraction” both claim “the presentation of audio and video streams,” the patent owner in an April 27 response tells the Patent Trial and Appeal Board that “in concrete terms” the technologies “are very different” (Google LLC v. Virentem Ventures LLC, No. IPR2019-01243, PTAB)....