Card file drawer
USD254526S · kind S · design
15Cited by
3References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 1, 1977 |
| Grant date | Mar 25, 1980 |
| Priority date | — |
| Expiry date | Mar 25, 1994 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.