Electrical appliance control
Patent 4638299 Issued on January 20, 1987. Estimated Expiration Date: 
January 20, 2004. 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.
January 20, 2004. 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 3564433 Multiple remote terminal digital control system Three-phase power distribution network communication system Remote control system of an optical repeater Digital signal distribution system Electric utility communication system with field installation terminal and load management terminal with remotely assignable unique address Patent #: 4467314 InventorAssigneeApplicationNo. 06/479397 filed on 03/28/1983US Classes:370/501, Repeater340/310.14, Zero crossing370/503, Synchronizing375/211REPEATERSExaminersPrimary: Olms, Douglas W.Assistant: Kuntz, Curtis Attorney, Agent or FirmInternational ClassesH04B 3/54 (20060101)H02J 13/00 (20060101) Foreign Application Priority Data1982-04-06 GBAbstractAn electrical appliance remote control system comprises a transmitter supplying digital control messages onto a power main and a receiver for receiving those messages to activate an appliances accordingly. Each message comprises words each of which is transmitted twice. A repeater is coupled to the main to receive the first occurrence of the word and to retransmit that word onto the main, or onto another main, in the period containing the second occurrence of the word.Other References
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