Safety helmet with ear muffs for hearing protection and fastening device therefor
USD244491S · kind S · design
16Cited by
3References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1975 |
| Grant date | May 31, 1977 |
| Priority date | — |
| Expiry date | May 31, 1991 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.