Columbia subject headings:
Intellectual property--United States.
Patent practice--United States--Evaluation.
Patents--United States--Economic policy.
Patents--United States.
Technological innovations--United States--Patents.
Harvard subject headings:
Intellectual property--United States.
Patent practice--United States--Evaluation.
Patents--United States
Patents--United States--Economic policy.
Technological innovations--United States--Patents.
Princeton subject headings:
Intellectual property--United States.
Patent practice--United States--Evaluation.
Patents--United States--Economic policy.
Patents--United States.
Technological innovations--United States--Patents.