Columbia subject headings:
Ethiofos--Law and legislation--United States.
Flurbiprofen--Law and legislation--United States.
Patent extensions--United States.
Patent laws and legislation--United States.
Sucrose polyester--Law and legislation--United States.
Harvard subject headings:
Ethiofos--Law and legislation--United States.
Flurbiprofen--Law and legislation--United States.
Patent extensions--United States.
Patent laws and legislation--United States.
Sucrose polyester--Law and legislation--United States.
Princeton subject headings:
Ethiofos--Law and legislation--United States.
Flurbiprofen--Law and legislation--United States.
Patent extensions--United States.
Patent laws and legislation--United States.
Sucrose polyester--Law and legislation--United States.