Columbia subject headings:
Great Britain. Patent Office--History--19th century.
Patent practice--Great Britain--History--19th century.
Harvard subject headings:
Great Britain. Patent Office--History--19th century.
Great Britain. Patent Office--Officials and employees--History--19th century.
Patent practice--Great Britain--History--19th century.
Princeton subject headings:
Great Britain. Commissioners of Patents--History.
Great Britain. Patent Office--History--19th century.
Great Britain. Patent Office--Officials and employees--History--19th century.