Diaphragm for speaker
US4428996A · kind A · utility
10Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 24, 1981 |
| Grant date | Jan 31, 1984 |
| Priority date | — |
| Expiry date | Jun 24, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/699
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A diaphragm for a speaker formed of a mixture of carbon fiber, pulp and polyvinyl alcohol fiber as a binder with a thermosetting resin on the diaphragm base on which a metal film is provided in the interstices between fibers and on the entire fiber surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.