Diving face mask
US5638552A · kind A · utility
16Cited by
5References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 28, 1995 |
| Grant date | Jun 17, 1997 |
| Priority date | — |
| Expiry date | Sep 28, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63C11/12
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A diving face mask comprising a pair of front lenses detachably engaged in lens holding portions of an outer peripheral frame and, annular inner peripheral frames to be snapped in the lens holding portions so as to bear against front surfaces of the lenses, said annular inner peripheral frames being cut away partially in the circumferential direction thereof and therefore being discontinuous circumferentially.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.