Abstract: Holding frames for hanging sheets of documents, such as posters and charts for storage, retrieval and reorganization of the stored items. Each stored sheet has one or more flat flexible plastic tabs with holes and slits attached to the back top edge. The spacing of the tabs matches the width of the storage frame. The holding frames can be used in two positions, a storage position and a selection position. In the selection position the stored items are easy to separate, review and locate. In the storage position the items are packed tightly. The holding frames are removable from the hanging facility to change the position or for transportation to different locations.

Abstract: A free-standing chart portfolio for display, storing, file acessing and transporting hanging sheets of documents, such as posters and charts (or other large graphics). The portfolio includes one or more storage frame, for receiving sheets having two flat flexible plastic tabs with holes and slits attached to the back top edge. The spacing of the tabs matches the width of the storage frame. The frame can be used in two positions, a storage position and a file access position. In the storage position the sheets are packed tightly. The storage frame is removable from the portfolio to change the position or for transportation to a different location. The portfolio has two hinged covers, which serve as protective covers, or, when opened, as stands of the portfolio.

Abstract: A tab/hook like device for hanging posters and charts (or other large graphics) for storage, retrieval and reorganization. One or more flat flexible plastic tabs with holes and slits, acting as easily opened and automatically closing tabs, are attached to the back top edge of the posters or charts to be stored. If multiple tabs are used, then the tabs are separated at a preestablished intervals along the top edge of the poster or chart. (Alternatively one long tab may be used spanning the same distance at the top of the poster or chart.) These tab/hooks holding a poster or chart are snapped onto the rods or rings of a holding rack. Because the posters and charts are hanging they are easy to separate, review and locate; and because the tab/hooks are flexible, individual posters or charts may easily be removed from the rack and placed back again on the rack in any other position within the established sequence of posters or charts.

Abstract: An educational toy that lets the user experiment with assembling hollow polyhedral building block in a variety of different ways. The toy includes new polyhedral building blocks which can be assembled in different ways to form a multiplicity of configurations. It allows the user to assemble building blocks to one configuration and then to change over from this configuration to another configuration by rotating, pivoting, rolling, or shifting one or more of the already assembled building blocks. The toy can be used to introduce the user to different number systems and arithmetic and geometric principles.

Abstract: The elastic pattern abacus relates to educational counting devices for learning basic number and arithmetic concepts. The present invention introduces a new flexible medium for threading and holding counters (beads or blocks of any shapes) in a sequence, such that: they slide easily, yet are automatically held stably at any desired positions along the sequence. The members of the abacus can be separated, counted, grouped, divided, and regrouped to demonstrate arithmetic concepts and number systems. A tool for changing the arrangement of the abacus beads is also disclosed.

Abstract: An educational toy that lets the user experiment with assembling components of different shapes in a variety of ways. The toy introduces new methods and means for assembling building blocks allowing the user to assemble them to one configuration and then to change over to other configurations by rotating, pivoting, rolling, or shifting one or more of the already assembled building blocks. The toy can introduce the user to number systems and arithmetic and geometric principles.