Mobile telephone casing
US6246763A · kind A · utility
2Cited by
2References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 21, 1999 |
| Grant date | Jun 12, 2001 |
| Priority date | — |
| Expiry date | Jun 21, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/605
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Acoustic leakage between a sound diffusion region of a mobile telephone, opposite a loudspeaker, and another region of the casing, open to the open air, solves the problem of overamplification of low frequencies when the casing is pressed against the listener's ear. The gain in the pass-band is modified in an expected direction only when the user presses the mobile telephone against his or her ear for private listening.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.