Folding keyboard for a personal digital assistant
US6679639B2 · kind B2 · utility
13Cited by
12References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 26, 2002 |
| Grant date | Jan 20, 2004 |
| Priority date | — |
| Expiry date | Jun 26, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/72409
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Prior collapsible keyboards for personal digital assistants are overly complex and large. The present invention provides a folding keyboard for a personal digital assistant which folds up simply and in a small size and which is useful for standard typists. It is divided into two halves hingedly connected along a fold line. While the central or home row keys are standard size, the other two rows of keys are of reduced transverse dimension and are preferably so shaped as to allow a touch typist to use existing movements without missing the keys of reduced size, as are the keys at either end of all three rows.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.