Teach-aiding weight set
US6739875B1 · kind B1 · utility
7Cited by
8References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 6, 2003 |
| Grant date | May 25, 2004 |
| Priority date | — |
| Expiry date | Jun 6, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09B19/02
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
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 grooves to show a plurality of equal sections corresponding to a specific weight thereof. The specific color, weight, and shallow-groove-divided sections of each of the weights help small children to learn primary mathematical concepts, particularly the concept of weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.