Welding mask
USD310276S · kind S · design
25Cited by
4References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1988 |
| Grant date | Aug 28, 1990 |
| Priority date | — |
| Expiry date | Aug 28, 2004 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.