Boron coated diaphragm for use in a loud speaker
US4135601A · kind A · utility
24Cited by
9References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 3, 1978 |
| Grant date | Jan 23, 1979 |
| Priority date | — |
| Expiry date | Apr 3, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A diaphragm for use in a loud speaker is constructed of a substrate formed into a diaphragm configuration from a thin plate or a sheet composed of an organic or an inorganic substance, and a coating layer made of boron, or, an alloy of which a major component is boron or a chemical compound of boron, being provided onto at least the surface of said substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.