(under subclass 21.1) Subject matter in which the means which permanently secures the parts of the book together includes some element made from metallic material.
SEE OR SEARCH THIS CLASS, SUBCLASS:
27.2, for a ring or arch type securing means which includes some metallic element, and see the Search Class Note appended thereto.
SEE OR SEARCH CLASS
227, Elongated-Member-Driving Apparatus, appropriate subclasses for apparatus for applying a member, e.g., a staple, to work.
270, Sheet-Material Associating,
37+, 52.18 and 58.08+ for similar securing means, e.g., stapling. 402, Binder Device Releasably Engaging Aperture or Notch of Sheet,
8+, for a sheet binder device of that class including a pliant, deformable sheet retainer and especially subclasses 14+ for such a device in which the sheet retainer (e.g., a metal strap, etc.) may be folded to secure the sheet.
