Crib block for retaining walls
USD300863S · kind S · design
18Cited by
21References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 29, 1986 |
| Grant date | Apr 25, 1989 |
| Priority date | — |
| Expiry date | Apr 25, 2003 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.