"The patent system added the fuel of interest to the fire of genius"
- Abraham Lincoln (1859)
"If we did not have a patent system, it would be irresponsible, on the basis of our present knowledge of its economic consequences, to recommend instituting one. But since we have had a patent system for a long time, it would be irresponsible, on the basis of our present knowledge, to recommend abolishing it."
- Fritz Machlup (1958)