Housing for an electronic educational video system
USD311523S · kind S · design
4Cited by
11References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1988 |
| Grant date | Oct 23, 1990 |
| Priority date | — |
| Expiry date | Oct 23, 2004 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.