Digital mobile phone with a plurality of switchable subscriber identification modules (SIMS)
US6292561A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 14, 1997 |
| Grant date | Sep 18, 2001 |
| Priority date | — |
| Expiry date | Jan 14, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2250/14
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The invention is directed to a digital mobile phone of a type using a subscriber identification module, the improvement being that there is an externally attached holder for at least two subscriber identification modules so that either can be readily selected by a switch for use in the same phone. There are also described flexible circuits that are used to connect the electrical contacts used conventionally for reading a subscriber identification module by the phone inside the phone that are able to slip through gaps that are naturally occurring between protective covers of the phone because of necessary manufacturing tolerances so that the external subscriber identification modules can be connected without prejudicing manufacturers warranties on any phone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.