Abstract: Binding pages of a book. A spine member has spine coupling features. A plurality of spinelet members each have one or more spinelet coupling features designed to repeatedly conjoin with and disconnect from a corresponding one of or set of the spine coupling features, or to spinelet coupling features of other spinelet members, and have a binding surface designed to provide a permanent or semi-permanent attachment for one or more pages of the book. A kit for binding books may include a device for making spinelet members, the device being adjustable to make spinelet members of varying widths corresponding to thicknesses of desired sections of the book.

Abstract: Methods and systems for electronically representing records of obligations are provided. The records are stored such that content describing an obligation from an obligor to an obligee is unalterable, identifiable as current and authentic, and non-repudiable. Transfers of ownership of the obligation may also be controlled and recorded using the electronic records. An obligation may not be recorded as being transferred without the consent of the of the current owner of the obligation. Security interests in obligations may also be recorded. The secured party may be able to control transfer of ownership of the obligations and modification of the electronic records. In preferred embodiments, these features may be achieved by using various digital signature and encryption techniques.

Abstract: A hand-held roller stamp that includes a wheel with a raised printing surface, and a housing that holds the wheel and permits it to rotate; the housing is configured to hold a porous-point marker with its nib positioned to continuously ink the printing surface.