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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Frieman; Shlomo Ruvane
Address:
Los Angeles, CA
No. of patents:
3
Patents:












Patent Number Title Of Patent Date Issued
6926530 Game apparatuses and methods for use in teaching the addition and subtraction of positive and ne August 9, 2005
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 positive units, (b) a plura
6786485 Dice game apparatus and methods for using same September 7, 2004
A dice game apparatus comprises a first numerical die, a second numerical die, and at least one operator die selected from the group consisting of a first operator die and a second operator die. While the dice game apparatus comprises the first operator die and/or the second operator die
6755658 Game apparatuses and methods for use in teaching the addition, subtraction, multiplication, and June 29, 2004
Game apparatuses and methods for assisting in teaching the addition, subtraction, multiplication, and division of positive and, especially, negative numbers, are based on the Null Theory of Adding, Subtracting, Multiplying, and Dividing Positive and Negative Numbers. An exemplary game










 
 
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