Folding stair unit
USD304499S · kind S · design
16Cited by
7References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 12, 1988 |
| Grant date | Nov 7, 1989 |
| Priority date | — |
| Expiry date | Nov 7, 2003 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.