Bizarre Patents
A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 8021159 | String math manipulative system and method A string math manipulative system and method is provided including series of a particular number of holed objects threaded on strings. The holed objects comprise one or more variations in color and/or shape and/or material, with the variations configured to represen... | 09/20/2011 |
| 7828553 | Mathematics teaching aid An apparatus and method for teaching involving teaching manipulatives. The teaching manipulative comprises a longitudinal rod having a plurality of multi-faced objects disposed upon its surface which are capable of substantially sliding along the length of the rod a... | 11/09/2010 |
| 7309233 | System and method of teaching and learning mathematics Numero Cubes and the Whole Number System are disclosed. In one embodiment, the system may comprise cubes, pegs, magnets, dividers, shafts, and a number placement panel. The shafts may comprise individual marks representing the base ten number system. The system may ... | 12/18/2007 |
| 7300286 | Educational tool An educational tool including a frame having a rod extending between its opposite sides. A number of beads are slidably positioned on the rod. A reckoning bar is slidably secured to the top of the frame. The reckoning bar bears indicia, for counting the beads, in th... | 11/27/2007 |
| 7153138 | Health management cuff A cuff (10, 110, 210, 310) for a health managing system includes a strand (14, 114, 214, 314) having first (16, 116, 216, 316) and second (18, 118, 218, 318) strand sections interconnected to define a loop (128, 228, 328). A plural... | 12/26/2006 |
| 7077655 | Calculation training tool, and calculation training system The calculation training tool comprises: a substrate; a plurality of bead-shaped members mounted movably on the substrate; and scales displayed on the substrate surface together with numerals for giving answers when an addition and a subtraction are made by moving t... | 07/18/2006 |
| D513762 | Abacus | 01/24/2006 |
| 6926530 | Game apparatuses and methods for use in teaching the addition and subtraction of positive and negative numbers A game apparatus and a method for assisting in teaching the addition and subtraction of positive and, especially, negative numbers, are based on the Null Theory of Adding and Subtracting Positive and Negative Numbers. The apparatus comprises (a) a plurality of posit... | 08/09/2005 |
| 6712614 | Abacus calculator An electronic abacus calculator comprising an electronic abacus display screen in combination with a numeric display and an electronic keyboard calculator. The invention also comprises a personal abacus, which comprises a mechanical abacus or an electronic abacus ca... | 03/30/2004 |
| 6676415 | Teaching aid A teaching aid comprises a frame (1), a plurality of elongate rods (2) mounted horizontally in the frame and spaced vertically from each other and a plurality of polyhedral blocks (3) rotatably mounted on each rod. Means are provided to releasably hold ea... | 01/13/2004 |
| 6561415 | Calorie management system A bracelet for counting calories is formed by a plurality of counting beads each having an aperture there through. A monofilament line is threaded in a looping manner through the aperture of each counting bead such that the line overlaps itself within the... | 05/13/2003 |
| 6551110 | Visual educational device for teaching literacy An educational device (11) for visually modeling words or numerals. The device including a plurality of inverted U-shaped rods (15) and a plurality of balls (17), each ball (17) being movable between a non display position and a display position. When the... | 04/22/2003 |
| 6375468 | Educational tool An educational tool including a rigid frame supporting a pair of parallel rods. A number of beads of equal width are slidably positioned on one of the rods. A reckoning slide is slidably and rotatably positioned on the other of the rods for counting the b... | 04/23/2002 |
| 6171111 | Educational device for illustrating mathematical relationships A device and method for demonstrating number theory is disclosed in which the device comprises a frame consisting of the plurality of spaced parallel rods which are secured at their ends to transverse members. The rods carry slidable members which are arr... | 01/09/2001 |
| 6129551 | Mathematical graph board A new mathematical graph board for teaching linear equations and linear inequalities. The inventive device includes a board having an outer peripheral edge. The board includes a pair of peg boards secured within the outer peripheral edge. The pair of peg ... | 10/10/2000 |
| 6099377 | Toy attachment for child's play pen A new toy attachment for child's playpen for attaching to a playpen to provide entertainment for a child. The inventive device includes a pair of side rails securable to an upper end of the opposed side walls of the playpen. Forward and rearward sections ... | 08/08/2000 |
| 5769639 | Multi-educational device A self-corrective, reversible device comprising a handled, slotted framework, on each side of which the top frame is imprinted with inverse mathematical symbols, below which is a number line from one through ten in ascending and descending order. Below th... | 06/23/1998 |
| 5725380 | Combination writing board and abacus A portable and foldable teaching aid combines an abacus and an inclined writing surface. The abacus helps teach math skills and the inclined writing surface helps strengthen hand and wrist muscles that are used in writing. The abacus and writing board are... | 03/10/1998 |
| 5423682 | Numbering system teaching aid A teaching aid for teaching young children counting in the tens numbering systems, in which four side by side stacks of nine blocks are each slidable on respective rods held in a frame, each of the nine blocks having one face of each block in the stack im... | 06/13/1995 |
| 5395245 | Elastic pattern abacus and tool for changing arrangement of abacus beads 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, ... | 03/07/1995 |
| 5382165 | Calorie counter device and method for use A calorie counting device comprising a card with a plurality of bands surrounding the card, a plurality of beads movably attached to each of the bands, means for determining a correct number of beads representing a given portion of food, and a method of u... | 01/17/1995 |
| 5377998 | Machine to track game effects A device is disclosed for enabling tracking of the duration and type of effect in fantasy board games of various types. The device also keeps track of any character affected by the events taking place in fantasy board games. The device is formed of two or... | 01/03/1995 |
| 5334026 | Manual sliding calculator An early age abacus type teaching device comprising a rod having movable counters thereon with corresponding sequentially spaced numerals therealong whereby the numerals are utilized to represent the calculation of the preceding manipulated counters and t... | 08/02/1994 |
| 5299806 | Educational device An educational device having a chamber with a plurality of holes extending through the chamber. A plurality of ropes are selectively configured in the chamber and portions of the ropes are exposed outside the chamber. The ends of the exposed ropes are con... | 04/05/1994 |
| 5205747 | Bead calculator educational toy An educational toy useable to teach elementary mathematics to children includes a spaced series of mutually aligned parallel rods secured in a side-by-side relationship at their opposite ends to a base portion of the toy. Series of counting beads are capt... | 04/27/1993 |
| 5190459 | Child's behavioral calendar apparatus A behavioral calendar structure is arranged to include a support plate mounting an upper housing and lower housing thereto. The upper housing includes a first"W" shaped loop to accommodate one counting sphere for each day per week. A second inverted "U" s... | 03/02/1993 |
| 5149269 | Manual teaching calculator An arithmetic teaching device consisting of a rod having hand movable spaced collars slidable thereon and having sequentially spaced numbers therealong corresponding to the collars whereby the numbers indicate visually the arithmetic calculation of precee... | 09/22/1992 |
| 4993952 | Arithmetic counter An arithmetic counter that includes a U-shaped support structure for a horizontal rod. Consecutively numbered beads are slidably arranged on the rod for adjustment to positions wherein selected numbers of the beads are separated from the remaining beads. ... | 02/19/1991 |
| 4884973 | Mathematic teaching aid An aid for teaching children addition and subtraction of two numbers according to an algebraic equation. Cards bearing selected integers and one card bearing a plus or minus sign are placed by the teacher on a panel in horizontally aligned spaces correspo... | 12/05/1989 |
| 4812124 | Hexadecimal abacus This abacus is an accurate instrument that is capable of performing complex arithmetic functions in the hexadecimal number system. Primarily, it consists of a frame having a multiple number of rods extending through a cross bar member, and eight beads are... | 03/14/1989 |
| 4629429 | Abacus with each counter held in position by friction or magnetic attraction An abacus for performing calculations by sliding counters along partition walls extending vertically. Each counter has a spherical or beadlike head protruding above the body of the abacus, as well as a stem. Shafts extend horizontally through the partitio... | 12/16/1986 |
| 4466799 | Cuboid block, instructional device for multiplication tables An instructional toy device for multiplication computation formed by a string of cuboid blocks having an interconnecting elastic string permitting equal segments of multiple blocks to be folded in a back and forth arrangement of aligned rows, the blocks e... | 08/21/1984 |
| 4448579 | Arithmetic instruction apparatus An educational teaching device which is formed in the shape of the hand or the foot of a human. In one embodiment of the invention, the educational device comprises a frame in the shape of a human hand having a palm, a thumb and four fingers, the frame ha... | 05/15/1984 |
| 4233757 | Mathematics device A mathematics device in which 100 cubes are arranged in parallel rows with 10 cubes in each row and rotatably mounted on a supporting rod. A rectangular frame encloses all of the cubes and supports the rods. Each cube has four peripheral faces, each face ... | 11/18/1980 |
| 4210093 | Counting device A counting device comprising a series of beads strung on a pair of flexible linear elements or cords. The beads can be moved up and down on the braided cords and will remain in adjusted position along the length of the cords.... | 07/01/1980 |
| 4176472 | Numbers teaching aid A numbers teaching aid particularly useful in teaching single digit numbers to children. The teaching aid comprises a series of flip cards in which each flip card illustrates a number in the number sequence of 0-10, and a plurality of beads equal in numbe... | 12/04/1979 |
| 3995378 | Mathematics visual teaching aid A mathematics visual aid particularly useful in teaching subtraction to both slow and fast learners. The apparatus includes in a preferred embodiment form a support structure having a plurality of vertical divider members which define a plurality of worki... | 12/07/1976 |
