Acoustic diaphragm
US4518443A · kind A · utility
3Cited by
4References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 20, 1983 |
| Grant date | May 21, 1985 |
| Priority date | — |
| Expiry date | May 20, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R31/003
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An acoustic diaphragm formed of beryllium or an alloy composed mainly of beryllium. Said diaphragm has a crystal structure having its plane (1120) preferentially orientated in parallel with the surface of the diaphragm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.