Electronic quiz unit for attachment to books
USD364643S · kind S · design
0Cited by
6References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 12, 1994 |
| Grant date | Nov 28, 1995 |
| Priority date | — |
| Expiry date | Nov 28, 2009 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.