From the date a U.S. patent is granted to a firm, it ceases to be a potential source of monopoly profits after
A. 7 years.
B. 20 years.
C. 14 years.
D. 1 year.
Answer: B
Economics
A. 7 years.
B. 20 years.
C. 14 years.
D. 1 year.
Answer: B