When the key operation area is pressed, a decision is made about whether the key is pre-registered a single button dialing telephone number or not (step 3). In case a decision is made that a single button dialing telephone number is pre-registered to the key in step 3, the timer starts when the key is...http://www.google.nl/patents/US6728558?utm_source=gb-gplus-sharePatent US6728558 - Portable telephone apparatus and control method thereof
Portable telephone apparatus and control method thereof
