ComputerWorld has an account with some interesting detail on one of the legal cases in the ongoing patent war between Apple and Samsung. The article notes that, in order to assert its design patent claim, Apple must successfully convince the judge to reject any examples of "prior art" Samsung's legal people might present to the court. In 1994 Knight-Ridder developed a tablet prototype that many people think may invalidate Apple's iPad patent.
While this patent war may be interesting for the legal profession, it has gotten out of hand. How, for example, can you patent what I call the "clip-board" form factor? It seems to me that all note-pad devices are variations on the old clip-board, although they come in various sizes. They are all becoming thinner, and lighter in weight, and in the process more appealing to human beings who have used clip-boards and small notebooks for ages.