Collapsible stereophone
US4404434A · kind A · utility
70Cited by
4References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1981 |
| Grant date | Sep 13, 1983 |
| Priority date | — |
| Expiry date | Aug 10, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/1058
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A stereophone includes a headband which supports cup assemblies at each of its ends. The cup assemblies can be pivoted to a transport position in which they are enclosed within the headband. The ends of the headband may be fastened together to retain the cup assemblies in this position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.