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Document Title |
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7021939 |
System and method for determining area of irregular or complex shapes
A system and method for determining area of irregular or complex shapes for easily determining area of complex shapes. The system and method for determining area of irregular or complex shapes...
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6739875 |
Teach-aiding weight set
A teach-aiding weight set includes a white, a red, a light green, a purple, a yellow, a green, a black, a brown, a blue, and an orange weight. Each of the weights is provided with spaced shallow...
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6200140 |
Double-beam math balance
The teaching aid apparatus provides two balance beams (27, 28), one above the other, on a support post (23). Weight-attachment stations (36) are provided on the left and right arms of both beams,...
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5951406 |
Adjustable see-saw apparatus
The seesaw device is adjustable as to the lengths of the moment arms on the beam, of the two seats. Children can adjust the moment-arm length of their own seat in order to compensate for weight...
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5927989 |
Four-pan algebra balance having an imbalance correction mechanism
A four-pan algebra balance includes an imbalance correction mechanism for maintaining a balance beam in a horizontal equilibrium position unless the imbalance between the two sides of the device...
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5425643 |
Mechanical, analog type, teaching aid computer
A teaching aid computer, requiring no electrical or spring power, designed for elementary and middle school students, that when properly set and manipulated, provides real number solutions to...
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4871314 |
Toy balance concept-developing device
A toy balance concept-developing device for helping children to develop a concept of balance, including a housing, a beam, a positioning means, a model and a number of plastic weights. Owing to the...
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4733887 |
Secure financial document
A financial instrument has an amount printed on its face in which the digits making up the amount are printed in a negative pattern. The digits are formed by a series of rows of printed dots which...
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4731022 |
Teaching arithmetic principles
A balance for teaching arithmetic principles has a balance arm pivotal about a central horizontal pivot axis coincident with the axis of a support rod supported in openings at the top of opposed...
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4240213 |
Educational amusement device for matching words with non-verbal symbols
The present educational amusement device includes a horizontally pivoted balance arm and several pairs of matched game pieces. The game pieces of each pair include one which displays a non-verbal...
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4218835 |
Animal scale toy
A toy balancing scale used to teach children the proper relationship between the number of objects and/or the value of numbers, has a base having an upstanding support and pivoted on the support is...
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4106220 |
Mathematical teaching aid
A balance beam teaching aid illustrates and verifies mathematical operations involving both integer and non-integer numbers. The balance beam includes a base, a balance arm having a center of...
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3949491 |
Mathematical teaching aid
This invention relates to a mathematical teaching aid comprising a beam which has two parallel longitudinal upper faces each face being divided up by equally spaced marks representing numbers, the...
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3928923 |
Mathematical balance
A mathematical balance is disclosed which is of one-piece, molded plastic construction, and which is employed as an aid primarily in the teaching of the basic mathematical operations of addition,...
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3797133 |
CALCULATORS
Calculating apparatus for teaching simple arithmetic comprises a support with a horizontally pivoted operating member in the form of a circular disc from which a segment has been removed to form a...
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3486244 |
DEVICE FOR ILLUSTRATING BASIC MATHEMATICAL PRINCIPLES,OPERATIONS,AND EQUATIONS
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3339291 |
Educational balance device
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3311997 |
Numerals balance scale
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3212202 |
Arithmetic teaching aid
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3188089 |
Game including tiltable game board and game pieces of different weights
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3000114 |
Combined balance for solving equations and inequalities
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3613268 |
Title is not available
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3567221 |
Title is not available
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