Electronic billboard for advertising display or the like
USD317790S · kind S · design
13Cited by
6References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 14, 1989 |
| Grant date | Jun 25, 1991 |
| Priority date | — |
| Expiry date | Jun 25, 2005 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.