[FoxPro]

Is there any written descriptions for this, in regards specifically to backup, prior to April 2000? If there is, it should render the patent null and void. Is this crazy, or what?

[Huusker]

Once a patent is issued you have to move heaven and earth to get the USPTO to repudiate it. Like any bureaucratic agency it will never voluntarily admit to a mistake. Basically you need to get threatened by the patent holder and then win the resulting lawsuit. Since it is ridicuously expensive, almost everybody just settles to make it go away.