Interactive learning pen
USD658183S1 · kind S1 · design
13Cited by
31References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 15, 2010 |
| Grant date | Apr 24, 2012 |
| Priority date | — |
| Expiry date | Apr 24, 2026 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.