Portable electronic device having an external I/O unit and power

Telephonic communications – With usage measurement

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

379112, 379114, 379144, 379357, 235380, 235382, 235379, H04M 1500, H04M 1700, G06F 1760, G06F 500

Patent

active

055419852

ABSTRACT:
An IC card reader-writer is integrated with a battery pack 15. This IC card reader-writer 16 has a control terminal CNT and a power supply control switch 30. A portable phone unit sends power-on/off signals, which are received by the control terminal CNT to turn on and off the power supply control switch 30 to control power supply from the battery 18 to the IC card reader-writer 16. The CPU 24 of the IC card reader-writer 16 controls power supply in such a manner that power is supplied to the IC card 22 only when access to the IC card 22 is necessary and stopped when access to the IC card 22 is unnecessary.

REFERENCES:
patent: 4868846 (1989-09-01), Kemppi
patent: 4900902 (1990-02-01), Sakakibara
patent: 4907257 (1990-03-01), Asano
patent: 4954072 (1990-09-01), Zimmerman
patent: 5105074 (1992-04-01), Nara
patent: 5109540 (1992-04-01), Dzung
patent: 5119414 (1992-06-01), Izumi
patent: 5138650 (1992-08-01), Stahl
patent: 5157247 (1992-10-01), Takahira
patent: 5168151 (1992-12-01), Nara
patent: 5247164 (1993-09-01), Takahashi
patent: 5266782 (1993-11-01), Alanara
patent: 5285055 (1994-02-01), Oonakahara
patent: 5317247 (1994-05-01), Chang
patent: 5335276 (1994-08-01), Thompson

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Portable electronic device having an external I/O unit and power does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Portable electronic device having an external I/O unit and power, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Portable electronic device having an external I/O unit and power will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1666693

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.