Wireless telephone apparatus with protection against power loss
Patent 4509201 Issued on April 2, 1985. Estimated Expiration Date: 
June 23, 2003. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 23, 2003. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3737782 3877001 Battery condition monitoring method and apparatus Source voltage drop detecting circuit Patent #: 4356481 InventorsAssigneeApplicationNo. 06/506906 filed on 06/23/1983US Classes:455/572, Power supply340/636.15, By voltage455/73TRANSMITTER AND RECEIVER AT SAME STATION (E.G., TRANSCEIVER)ExaminersPrimary: Ng, Jin F.Attorney, Agent or FirmInternational ClassesH04B 1/40 (20060101)H04Q 7/32 (20060101) Foreign Application Priority Data1982-06-23 JPAbstractTwo limit voltages are established for a wireless telephone apparatus. If the power supply voltage exceeds the first limit voltage, the transmitter of the wireless telephone apparatus is prevented from radiating signals. At the same time, the central processing unit of the wireless telephone apparatus shelters, in a dedicated shelter register, the control data necessary to carry on communication once power is restored, and an inhibit circuit prevents the central processing unit from writing into the read-write memory. If the power supply voltage exceeds the second limit voltage, the central processing unit is disabled from exercising control of the apparatus. When the power supply voltage returns within the second limit voltage, the central processing unit is enabled to exercise control over the apparatus. When the power supply voltage returns within the first limit voltage, the transmitter is enabled to radiate signals and the central processing unit reestablishes communication using the sheltered data. | |
