Columbia subject headings:
Harvard subject headings:
Antitrust law--European Union countries
Drugs--European Union countries--Patents.
Drugs--Japan--Patents.
Drugs--United States--Patents.
Pharmaceutical industry--Technological innovations
Princeton subject headings:
Antitrust law--Europe.
Drugs--Patents.
Patent extensions--Japan.
Patent laws and legislation--Europe.
Patent laws and legislation--Japan.
Patent laws and legislation--United States.
Patents.
Pharmaceutical industry--Europe.
Pharmaceutical industry--Japan.
Pharmaceutical industry--United States.
Product life cycle.