Raymond Burr died, but Hale's real-life son William Katt played the role of Paul Drake, Jr. The movie was so successful that Burr made a total of 26 Perry Mason television films before his death. Many were filmed in and around Denver, Colorado. By 1993, when Burr signed with NBC for another season of Mason films, he was using a wheelchair full-time because of his failing health. In his final Perry Mason movie, "The Case of the Killer Kiss", he was shown either sitting or standing while leaning on a table, but only once standing unsupported for a few seconds. Twelve more
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