Core barrel head assembly with axial groove
USD644668S1 · kind S1 · design
8Cited by
48References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 14, 2011 |
| Grant date | Sep 6, 2011 |
| Priority date | — |
| Expiry date | Sep 6, 2025 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.