Modular wheel chair ramp unit
USD315046S · kind S · design
9Cited by
2References
1Claims
0Family size
Inventor
Key dates
| Filing date | Jul 21, 1987 |
| Grant date | Feb 26, 1991 |
| Priority date | — |
| Expiry date | Feb 26, 2005 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.