(under subclass 80) Devices wherein all parts are metallic.
SEE OR SEARCH THIS CLASS, SUBCLASS:
78, for safes, safe walls and safe plates made of a single alloy.
SEE OR SEARCH CLASS
428, Stock Material or Miscellaneous Articles,
609, for metallic stock comprising plural layers having an irregular interface, and subclasses 615+ for other composite metallic stock defined in terms of the composition of its component.