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| Number | Title | Issue Date |
| 7942675 | Calculus teaching aid A calculus teaching aid includes a substrate, a plurality of visual components configured to define a two-dimensional graphical model of the first derivative, and a plurality of symbolic labels configured to define a variety of characteristics of the graphical model... | 05/17/2011 |
| 7713060 | Joining mechanism for lightweight applications A convex polyhedron is formed from planar polygonal members, wherein aligned sides of adjacent abutting polygonal members meet to form edges of the polyhedron. A flexible polycarbonate plastic joining tab fits into slots in the centers of sides of adjacent polygonal... | 05/11/2010 |
| 7364431 | Educational game A multiplication game consisting of a perforated game board in which the assemblage of perforations forms a rectangular matrix. In a horizontal row of numerals printed on the rim of the board the numerals increase evenly in value from one end to the other end, and b... | 04/29/2008 |
| 7292964 | Translating of geometric models into block diagram models Methods and systems for translating models generated in one modeling environment into models that can be used in other modeling environments are disclosed. Models are created using different data formats in different modeling environments. These data formats are gen... | 11/06/2007 |
| 7278245 | Radial-hinge mechanism A radial-hinge mechanism includes one or more elongated members arranged and interconnected into a unique, geometry-based, closed-loop assembly often resembling a multi-point star when in its fully-closed mode. The mechanism's signature function is its variable natu... | 10/09/2007 |
| 7249746 | Closed-cell foam end cap riser A multi-piece display device for the point-of-sale display of produce and other damageable items, manufactured out of a closed cell foam material and of solid construction, with each piece being a monolithic, flexible support block, whereby each of said support bloc... | 07/31/2007 |
| 7238027 | Device functionality representation tool An apparatus for demonstrating cardiac device function and patient cardiac function over time, including a board with a coordinate system representing time, the board having one or more colored areas representing cardiac device function and patient cardiac function ... | 07/03/2007 |
| 7223207 | Exercise and massage device An exercise device includes a housing having at least a wall portion, at least two apertures extending through the wall portion and spaced from each other, and at least one elongate rod having a center section located between opposite ends. The center section is ada... | 05/29/2007 |
| 7125597 | Pennant tape A tape barrier, warning, or display composed of flexible material having generally parallel edges and substantially greater length than width with cuts made into the tape at intervals along the tape defining pennants and connecting bands. The tape may be any color o... | 10/24/2006 |
| 7096239 | Trigonometry calculator A trigonometry calculator is programmed with four selectable calculations of unknown parameters of any plane triangle having three known parameters. The calculations accept known parameters of SIDE SIDE ANGLE, SIDE ANGLE SIDE, SIDE SIDE SIDE, and ANGLE ANGLE SIDE an... | 08/22/2006 |
| 6993879 | Molded plastic truss work A molded plastic truss work includes an upper grid and a lower grid, with a plurality of interconnecting members interconnecting the grids. The upper grid includes longitudinal members and transverse members that extend between and interconnect the longitudinal memb... | 02/07/2006 |
| 6921314 | Intercleaving spatially dichotomized polyhedral building blocks and extensions The invention is a system and set of intercleaving (interfitting and adhering/clinging) toy or real polyhedral construction elements which may be implemented either directly in physical form or indirectly in a virtual reality via the hardware of a computer system. T... | 07/26/2005 |
| 6790118 | Block set for educational purposes The object of this invention is to provide a block set for educational purposes. The block set features that a plurality of block units of the same color are integrated so as to build a block bar, and two or more block bars respectively of different colors are cross... | 09/14/2004 |
| 6652347 | Entertainment device An entertainment device comprising a plurality of rotational member divided into two groups: triangular members 10 and pentagonal members 20, a plurality of arcuate movable pieces 30 and a base for rotatably supporting said triangular and pentagonal membe... | 11/25/2003 |
| 6641453 | Construction set for building structures A novel construction set particularly useful for children safely to assemble and use two-and three-dimensional structures of a wide range of sizes and shapes with flexible foam-like tubes or rods detachable to male or female elements carried by foam-like ... | 11/04/2003 |
| 6553678 | Austin triangle I have discovered it is possible to find an indirect measurement if the vertex angle is given and the sides and the diameter are given. Using an instrument having the shape of an isosceles triangle it is possible to have a vertex angle and two congruent s... | 04/29/2003 |
| 6309716 | Tessellation set Sets of tessellatable elements are disclosed, in which a relatively low number of different elements may be combined together to provide very attractive tessellating patterns. The elements may be in the form of tiles, for paving or for covering flooring o... | 10/30/2001 |
| 6241572 | Manipulable beaded string A manipulatable beaded string toy device comprising of a plurality of interconnectable elements, each element including a number of beads disposed on a cord. When the plurality of interconnectable elements are interconnected, a junction formed comprises a... | 06/05/2001 |
| 6213779 | Conic section activity boards The present invention provides a variety of laminated plastic activity boards that allow the individual to visualize and have interactive exploration of conic sections and their definitions. This allows for more class time to be spent investigating the co... | 04/10/2001 |
| 6159329 | Self-adhesive graph appliques A method of incorporating small graphs on to pages of text or calculations by using small adhesive-backed appliques or labels which have been pre-printed with a graphical coordinate grid. These appliques eliminate the necessity of a separate piece of grap... | 12/12/2000 |
| 6142785 | Educational set of gloves An educational device and method is provided. Comprising a first glove having a first set of digits for receiving the fingers and thumb of one hand and a second glove having a second set of digits for receiving the fingers and thumb of the other hand. A f... | 11/07/2000 |
| 6132217 | Method and apparatus for teaching relationship of trigonometric functions between unit circle and rectangular coordinate system A method and apparatus for teaching a relationship of trigonometric functions between a unit circle and a rectangular coordinate system has a primary flexible member movable between a circular configuration defining the unit circle, and a straight configu... | 10/17/2000 |
| 6065968 | Toy for forming variable three-dimensional design A toy that may be used to make three-dimensional designs from elastic members comprises a base and at least one, and preferably two, vertical sidewalls rotatable relative to the base. The base and the at least one sidewall each have a face surface with a ... | 05/23/2000 |
| 6017220 | Magnetic geometric building system A construction kit comprising a plurality of connectable magnetic members having north and south magnetic poles on their opposite faces.... | 01/25/2000 |
| 6004182 | Temporary structure The structures of this invention comprise a plurality of panels. Rod formations are associated with the panels along at least some edges thereof. Joining devices consisting of elongated frame members are provided with openings for removably receiving the ... | 12/21/1999 |
| 5967788 | Toy device for illustrating mathematics The present invention relates to a toy device designed for illustrating mathematical concepts, with the toy device made from any of a variety of flexible materials. The toy device will have at least one outer edge and at least one inner edge, as well as, ... | 10/19/1999 |
| 5921781 | 3-dimensional models showing chemical point group symmetry A three-dimensional instructional model used to exhibit and represent specific point groups used in the application of group theory to symmetry operations and molecular structure. A pair of blocks, each have a pair of spaced faces with peripheral side sur... | 07/13/1999 |
| 5873729 | Mathematical triangle kit and method of use A mathematical triangle kit designed to teach children and adults mathematical and symmetry skills utilizing various sized patterned blocks. By manipulating the patterned blocks the participant learns mathematical skills, such as fractions, multiplication... | 02/23/1999 |
| 5785529 | Connector for modeling kits A connector body (10) for joining elongated rods or struts (12) for use in creating three-dimensional structures or models is disclosed. The connector body (10) includes a plurality of resilient particles (14) such as spherical balls formed of polystyrene... | 07/28/1998 |
| 5660387 | Polyhedron puzzle A set of polyhedrons have shapes capable of fitting together, in one or more ways, into a solid geometric shape such as a rectangular solid or more specifically, a cube. The polyhedrons include five-sided polyhedrons made up of a regular tetrahedron and a... | 08/26/1997 |
| 5651679 | Virtual polyhedra models Kaleidoscopes are used to show solid-appearing images of the Platonic and Archimedean polyhedra (except the snub solids) and of the Kepler-Poinsot stellations. The polyhedra are divided into families related by possessing the same planes of mirror and rot... | 07/29/1997 |
| 5639090 | Geoboard with movable pins A geoboard has a board member with a plurality, advantageously four edges. An array of holes which is preferably in the form of a matrix, is provided in the board member for receiving slidably mounted push-up pins. Each push-up pin has upper and lower pos... | 06/17/1997 |
| 5599188 | Didactic-educational toy for elementary arithmetic operations, reading and writing A didactic-educational toy for elementary arithmetic operations includes a plurality of transparent plates. Each of the transparent plates has ten circular orifices. The orifices are distributed symmetrically in two rows. Each row has five of the orifices... | 02/04/1997 |
| 5584699 | Computerized system for teaching geometry proofs A system for teaching proofs, including a set of playing cards and a playing field electronically displayed on a computer game screen. The playing field includes two boxes labelled "GIVEN" and "CONCLUSION" for entry of a premise and a conclusion from a th... | 12/17/1996 |
| 5433611 | Teaching apparatus and method for visually representing polynomial expressions An apparatus for teaching polynomial expressions includes an arrangement of groups of rows and columns that represent the variables of factors of a polynomial expression. Each group of columns or rows has a different width or height, respectively, and rep... | 07/18/1995 |
| 5407356 | Pictorial image transforming manipulative-with multiple channel tracks A visual aid teaching device for translating one or more superimposed picture images in a linear path at different positions with respect to a stationary underlay picture includes as basic components: a pair of edge strip members, each embodying two or mo... | 04/18/1995 |
| 5370538 | Devices for transforming pictorial images in orthogonal dimensions This present invention relates to displaying devices for instructive purposes. One object of this invention is to provide a composition of translations or a combination of rotation and translations in two orthogonal dimensions, to locate superimposed pict... | 12/06/1994 |
| 5343369 | Light table for teaching geometric principles A light table includes a housing extending in a horizontal direction having legs extending downwardly therefrom. The housing defines X- and Y-axes and has an X-Y grid pattern formed thereon and visible from above the housing. A lighting system is used to ... | 08/30/1994 |
| 5328374 | Geometry board A geometry board having pegs arranged on its top face for the demonstration of planar geometric figures by stretching of elastic bands about the pegs. The disclosed board is of clear injection-molded plastic and has a square face with the pegs arranged in... | 07/12/1994 |
| 5316483 | Geometric display device and method of demonstrating geometric shapes A device and method for illustrating geometric shapes are disclosed which enables individuals to study and visualize the interrelation between geometric shapes and more particularly complementary geometric shapes such as tetrahedrons. The apparatus includ... | 05/31/1994 |
