Columbia subject headings:
Harvard subject headings:
Copyright--United States--Handbooks, manuals, etc.
Inventions--United States--Handbooks, manuals, etc.
Patent laws and legislation--United States--Popular works.
Patents--United States--Handbooks, manuals, etc.
Trademarks--United States--Handbooks, manuals, etc.
Princeton subject headings:
Patent laws and legislation--United States--Popular works.