unnamed
rsz_us_patents_1

Sources:

Rothwell, Jonathan, Jose Lobo, Deborah Strumsky, and Mark Muro. Patenting Prosperity: Invention and Economic Performance in the United States and its Metropolitan Areas. Rep. N.p.: Brookings Institution, n.d. Print.

Shapiro, Robert, and Kevin Hassert. The Economic Value of Intellectual Property. Rep. N.p.: Sonecon, n.d. Print.

Intellectual Property and the U.S. Economy: Industries in Focus. Rep. N.p.: Dept. of Commerce, n.d. Print.