Patents Assigned to Richard F. Sanabria
  • Patent number: 4880327
    Abstract: A combination loose-leaf ring binder and foldable bookstand is quickly erectable and develops increasing stability with increasingly heavier loads under the designed gravity lock principle. Quick closure is effected upon removal of the load. In combination, a juxtaposed pair becomes a larger display stand. Four alternative erected configurations serve as a drawing board, a flip chart easel a lectern and as a copyholder for typing, all at their various appropriate angles. Other embodiments of the bookstand feature extra compact folding and integration with a book cover.
    Type: Grant
    Filed: September 16, 1988
    Date of Patent: November 14, 1989
    Assignee: Richard F. Sanabria
    Inventor: Ronaldo M. Sanabria