Telephone
US4866764A · kind A · utility
Inventor
Key dates
| Filing date | Aug 26, 1988 |
| Grant date | Sep 12, 1989 |
| Priority date | — |
| Expiry date | Aug 26, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/22
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A telephone has a first keypad provided with conventionally numbered touch tone keys. A second keypad has a plurality of transparent keys, each provided with a slot for the insertion of a small picture or symbolic representation. Optical fiber may be embedded in each of the transparent keys for illuminating the pictures. The telephone is provided for use with a conventional handset or as a speaker phone. Each of the keys in the second keypad are connected to actuate the speaker phone section of the telephone. The keys of the second keypad are each associated with a memory for the assignment of a telephone number associated with the picture or symbolic representation inserted within the key slot. A large emergency 911 key is also provided. The telephone is designed for use by small children.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.