SPA step unit
USD310415S · kind S · design
6Cited by
11References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 4, 1987 |
| Grant date | Sep 4, 1990 |
| Priority date | — |
| Expiry date | Sep 4, 2004 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.