Columbia subject headings:
Copyright--United States.
Industrial property (International law)
Patent practice--United States.
Trademarks--Law and legislation--United States.
Harvard subject headings:
Copyright--United States.
Industrial property (International law)
Patent practice--United States.
Patents
Trademarks--United States
Princeton subject headings:
Copyright--United States.
Industrial property (International law)
Patent practice--United States.
Trademarks--United States.