A radio telephone apparatus, such as a car telephone, and the method of controlling a radio telephone apparatus, in which the OFF operation of a power source switch caused by an erroneous operation is inhibited when the radio telephone is in a talk mode. In more in detail, the ON or OFF state of the...http://www.google.com/patents/US5404578?utm_source=gb-gplus-sharePatent US5404578 - Radio telephone in which an off operation of an operator-actuated power switch is inhibited during a talk mode
