Education and demonstration – Mathematics – Arithmetic
Reexamination Certificate
2008-04-29
2008-04-29
Fernstrom, Kurt (Department: 3711)
Education and demonstration
Mathematics
Arithmetic
C434S128000, C434S207000
Reexamination Certificate
active
07364431
ABSTRACT:
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 below each numeral is disposed a column of perforations. A column of numerals is printed on the edge of the board such that the numerals increase evenly in value from one end to the other end. A set of chips is provided, the total number of which equals to the product of the largest value in the column multiplied by the largest value in the horizontal row, and each chip is insertable in a cut-out window of the board. Each chip has one numeric value inscribed on its upper face, such that for each multiplication of any number in the row with any number of the column there is found a matching numeral on a chip. Two sets of coloured stripes are printed on the upper face of the board, such that all the stripes in each set are parallel, and each stripe in a set is uniquely coloured, and all stripes in a set are perpendicular to all the stripes in the other set.
REFERENCES:
patent: 1403989 (1922-01-01), Verneau
patent: 2654963 (1953-10-01), Van Dijck
patent: 3224114 (1965-12-01), Swanson
patent: 3456364 (1969-07-01), Alexander
patent: 3659851 (1972-05-01), Lang et al.
patent: 3735504 (1973-05-01), Fedyna
patent: 3975021 (1976-08-01), Brown
patent: 4445865 (1984-05-01), Sellon
patent: 5219289 (1993-06-01), Derr
patent: 6062864 (2000-05-01), Rood
patent: 6089871 (2000-07-01), Jaffe
patent: 6695618 (2004-02-01), Donn
patent: 7104799 (2006-09-01), Sansing
LandOfFree
Educational game does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Educational game, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Educational game will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2792337