Columbia subject headings:
American Bar Association. Section of Patent, Trademark, and Copyright Law--Congresses.
Copyright--United States--Congresses.
Patent laws and legislation--United States--Congresses.
Trademarks--United States--Congresses.
Harvard subject headings:
Copyright--United States--Congresses.
Patent laws and legislation--United States--Congresses.
Trademarks--United States--Congresses.
Princeton subject headings: