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Foldable portable communication terminal device

  • US 7,031,743 B2
  • Filed: 11/09/2001
  • Issued: 04/18/2006
  • Est. Priority Date: 11/14/2000
  • Status: Expired due to Term
First Claim
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1. A foldable portable telephone comprising a casing having a main body case and a lid case openably connected thereto and having a power source circuit for supplying power to a device body, an on/off circuit for turning on/off power supply from the power source circuit to the device body, and a power supply control circuit for controlling operation of the on/off circuit, the casing having a plurality of manual keys so arranged in positions whereby said manual keys can be depressed with the casing closed, the power supply control circuit turning off the on/off circuit when the plurality of manual keys are simultaneously held depressed for at least a predetermined period of time following detection of the lid case being closed, and not turning off the on/off circuit following detection of the lid case being open.

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