Original sentence: ) MDSA contended that the patents that Northpoint had been granted were invalid since the patents essentially covered attributes of a satellite dish and Northpoint had not invented satellite dishes.,  on the grounds of patent infringement (US Patents #5,761,605 and #6,169,878.Pierce, Florida  invalidated both asserted Northpoint patents on four separate grounds
Edited sentence: ) MDSA contended that the patents that Northpoint had been granted were invalid since the patents essentially covered attributes of satellite dish and Northpoint had not invented satellite dishes.,  a company set up primarily to lobby the FCC and Congress for free RF spectrum, on the grounds of patent infringement (US Patents #5,761,605 and #6,169,878.Pierce, Florida agreed with MDSA and invalidated both asserted Northpoint patents on four separate grounds