Educational display with a clock and with numeral and date block

Details Educational display with a clock and with numeral and date block Educational display with a clock and with numeral and date block

1998-01-14

1999-10-19

Harrison, Jessica J.

Education and demonstration

Mathematics

Arithmetic

434403, 434429, 434188, G09B 100

Patent

active

059677872

ABSTRACT:
The invention herein relates to a kind of teaching tool that allows children at play to perform simple addition, subtraction, multiplication and division arithmetical operations, learning decimal concepts and practices through experience and, furthermore, learn about year, month, day and day of the week as well as the hour, minute and second clock positions, which enables the invention herein to be an multi-functional teaching tool that combines fun with learning and the promotion of intellectual development.

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patent: 3564741 (1971-02-01), Kahre et al.
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patent: 4472892 (1984-09-01), Yang
patent: 5297965 (1994-03-01), Manancero
patent: 5537369 (1996-07-01), Wu
patent: 5683252 (1997-11-01), Tsao

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