Hand held communication aid for the dumb
US4075621A · kind A · utility
20Cited by
2References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 5, 1976 |
| Grant date | Feb 21, 1978 |
| Priority date | — |
| Expiry date | Nov 5, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M11/20
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A hand held communication aid for the dumb includes a casing, containing a keyboard, which is easily held in one hand and the keyboard positioned to be operated by the other hand of the user or "speaker". The end of the casing has a visual light emitting diode type alpha-numeric display unit facing the reader who would be standing opposite the user. Provision is also made for connecting this unit into a telephone system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.