Handheld device for interactive learning
USD675615S1 · kind S1 · design
5Cited by
17References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 13, 2012 |
| Grant date | Feb 5, 2013 |
| Priority date | — |
| Expiry date | Feb 5, 2027 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.