"Magnetic tape, which stores most of the world’s computer backups, can degrade within a decade. According to the National Archives Web site by the mid-1970s, only two machines could read the data from the 1960 U.S. Census: One was in Japan, the other in the Smithsonian Institution. Some of the data collected from NASA’s 1976 Viking landing on Mars is unreadable and lost forever."

"Correcting Inventorship: An issued patent is presumed to name the correct inventors. Thus, an inventorship challenge must bring "clear and convincing evidence" that the newly surfaced inventor "contributed to the conception of the claimed invention." "Simply reducing to practice that which has been conceived by others is insufficient for co-inventorship." Under the clear and convincing standard, the inventorship challenge "must be corroborated by independent evidence.""