Novel educational toy
US4027402A · kind A · utility
200Cited by
3References
8Claims
0Family size
Inventors
Key dates
| Filing date | Apr 2, 1976 |
| Grant date | Jun 7, 1977 |
| Priority date | — |
| Expiry date | Apr 2, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09B7/06
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A case and question and answer combination cards having notches in various depths on both longitudinal sides. Question setting and answer setting plates with releasable fixing levers and an indication mechanism is provided on the case. A pair of ropes extend between the card and the question setting and answer setting plates and are connected to the indication mechanism. The ropes are pressed by the plates against both notched sides of the card to determine a correct or incorrect answer in accordance with the depth of the notches. The results are indicated by the indication mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.