Portable keyboard apparatus
US6629794B2 · kind B2 · utility
5Cited by
13References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 19, 2002 |
| Grant date | Oct 7, 2003 |
| Priority date | — |
| Expiry date | Apr 22, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2250/70
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A portable keyboard apparatus includes a set of movable parallel linkages connected at joints and configured to expand and collapse. A plurality of button assemblies, including associated actuators and contacts, is coupled to the parallel linkages, preferably at corresponding joints of the linkages. A plurality of electrical connections are configured to electrically couple the contacts of each button assembly actuator to the at least one input/output port.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.