Telephone handset for mixed-mode voice-and-TDD communication
US6668042B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 24, 2001 |
| Grant date | Dec 23, 2003 |
| Priority date | — |
| Expiry date | May 24, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/2155
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A modular telephone handset (100) comprises an earpiece (102), a mouthpiece (104), and a handle (106) detachably attached at one end to the earpiece and at the other end to the mouthpiece. Attachment and detachment is effected by snap or twist joints (108,110). This allows one of the earpiece and the mouthpiece when detached to be used by a human user for listening or talking on a telephone call while simultaneously allowing the other of the earpiece and the mouthpiece to be used for receiving or transmitting data with an acoustic coupler (202) of a TDD device (200), thereby facilitating mixed-mode TDD-and-voice communication at any telephone that is equipped with the modular handset.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.