Arithmetic instruction apparatus

Details Arithmetic instruction apparatus Arithmetic instruction apparatus

1982-05-07

1984-05-15

Grieb, William H.

Education and demonstration

Mathematics

Arithmetic

G09B 1902, G06C 100

Patent

active

044485794

ABSTRACT:
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 having a first groove in the palm, a second groove in the thumb, and a third, fourth, fifth and sixth groove in the first finger, second finger, third finger and fourth finger respectively, the grooves containing one or more beads that can be manipulated to perform, and teach the student, various arithmetic operations. In another embodiment of the invention, the frame is in the shape of a human foot with a similar arrangement of grooves therein.

REFERENCES:
patent: D9303 (1876-05-01), Kendall
patent: D181754 (1957-12-01), Schott
patent: D203176 (1965-12-01), Kardach
patent: D215004 (1969-08-01), Dota
patent: D217911 (1970-06-01), Herold
patent: 2228554 (1941-01-01), Brown
patent: 2857686 (1958-10-01), Blake
patent: 2888753 (1959-06-01), Swarts
patent: 3092917 (1963-06-01), Podell
patent: 3455034 (1969-07-01), Schott
patent: 3508348 (1970-04-01), Harada
patent: 3731401 (1973-05-01), Kodima
patent: 3758962 (1973-09-01), Bagdasar

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