Portable stair
USD589630S1 · kind S1 · design
9Cited by
13References
1Claims
0Family size
Inventors
Key dates
| Filing date | Sep 10, 2007 |
| Grant date | Mar 31, 2009 |
| Priority date | — |
| Expiry date | Mar 31, 2023 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.