Raymond Burr award in 1959 and 1961 for his performance as Perry Mason. The series has been rerun in syndication ever since, and was released on DVD between 2006 and 2013. Though Burr's character is often said never to have lost a case, he did lose two murder cases -- offscreen -- in early episodes of the series. Burr moved from CBS to Universal Studios, where he played the title role in the television drama "Ironside", which ran on NBC from 1967 to 1975. In the pilot episode, San Francisco Chief of Detectives Robert T. Ironside is wounded by a sniper during
Burr (edge) for a significant portion of manufacturing costs. In the printmaking technique of drypoint, burr, which gives a rich fuzzy quality to the engraved line, is highly desirable—the great problem with the drypoint medium is that the burr rapidly diminishes after as few as ten impressions are printed. There are three types of burrs that can be formed from machining operations: "Poisson burr", "rollover burr", and "breakout burr". The rollover burr is the most common. Burrs may be classified by the physical manner of formation. Plastic deformation of material includes lateral flow (Poisson burr), bending (rollover burr), and tearing of material