Sughrue, Mion, Zinn, Macpeak and Seas
Radio pager receiver capable of informing whether or not memory backup is correct
 A radio pager receiver has a memory with a message area, and an additional area and a message processor for processing a message signal into messages and to store the messages in the message area. A specific datum is written (S6) in the additional area by the message processor. Although the message processor and the memory are activated by main electric power of a power supply circuit, only the memory is backed up by backup electric power of a backup power source. When the memory and the message processor are activated after once deactivated, the message processor judges (S2) whether or not the specific datum is correctly kept. The message processor controls display (S3 and S4) of a result of judgement. In the message area and the additional area, entries may be erased (S8) by the message processor when the specific datum is not correctly kept. When the specific datum is correctly kept, the message processor may make a display unit display each of the messages together with an announcement which indicates whether or not the each of the messages is subjected to a backup operation by the backup electric power. 
NEC Corporation
G
G08B
inventional
Toshihiro Takashi
Mori Oyagi