Telephone handset
US7657049B2 · kind B2 · utility
5Cited by
4References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 9, 2004 |
| Grant date | Feb 2, 2010 |
| Priority date | — |
| Expiry date | May 8, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/11
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An improved telephone handset for hearing-impaired persons. A passive device, in the form of an inductor wound about a highly magnetostrictive core, is connected with the speaker in the handset. The device has been found to improve intelligibility of speech delivered by the handset, when perceived by persons afflicted with certain types of hearing impairment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.