Portable information device
US6306538A · kind A · utility
28Cited by
5References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 24, 1997 |
| Grant date | Oct 23, 2001 |
| Priority date | — |
| Expiry date | Oct 24, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A card body 2 has two battery holding sections (13, 14) inside, and two battery holders (9, 10) each containing a battery are housed therein. The two housed battery holders (9, 10) engage locking portions (22a, 22b) of a stopper (11), thereby setting them unremovable. When the stopper (11) is slid toward one battery holding section (14), the battery holder (10) therein is still kept unremovable, while the other battery holder (9) can be made removable. Thus, even during battery change, at least one battery always remains in the card body to keep supplying a backup voltage to a volatile memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.