Columbia subject headings:
Musical inventions and patents--Catalogs.
Patents--Italy--Catalogs.
Harvard subject headings:
Catalogs
Musical inventions and patents--Catalogs.
Patents--Italy--Catalogs.
Princeton subject headings:
Musical instruments--Italy--Patents--History--19th century.
Musical instruments--Italy--Patents--History--20th century.
Musical instruments--Italy--Patents--History--21st century.