Diving snorkel with convoluted tube
US3993060A · kind A · utility
22Cited by
7References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 11, 1974 |
| Grant date | Nov 23, 1976 |
| Priority date | — |
| Expiry date | Dec 11, 1994 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63C11/205
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A diving snorkel has a flexible, tubular section having a substantially smooth inner surface to permit laminar air flow therethrough.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.