Originally Posted by Bobby Jr
A blue clay court per se would seem unable to be patented - however, different countries definitely vary greatly in how strictly or lax their protection applications are handled.
Patents were introduced with the goal of promoting research: by giving a short to mid term monopoly on a product to a company, it ensured a financial value in researching. Your efforts no longer could be used freely by anyone. However, it still is about using a market failure to solve an other one -- you're still preventing competition. If you know anything about economics, you understand what sort of crazy incentives it can results in...
Besides, all he did was using cunningly something that already was used for other purposes... he's not the first guy to dye clay, nor the last one; but he's the first one to use it to make tennis courts on the ATP tour.