Educational module with swingable end panels
USD249609S · kind S · design
27Cited by
4References
1Claims
0Family size
Inventor
Key dates
| Filing date | Dec 29, 1976 |
| Grant date | Sep 26, 1978 |
| Priority date | — |
| Expiry date | Sep 26, 1992 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.