Protractor
USD335823S · kind S · design
5Cited by
4References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1991 |
| Grant date | May 25, 1993 |
| Priority date | — |
| Expiry date | May 25, 2007 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.