Educational device
USD531669S1 · kind S1 · design
8Cited by
8References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2005 |
| Grant date | Nov 7, 2006 |
| Priority date | — |
| Expiry date | Nov 7, 2020 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.