Communication systems
Patent 4086569 Issued on April 25, 1978. Estimated Expiration Date: 
April 25, 1995. 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.
April 25, 1995. 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 2378326 3702460 3786421 3824544 3897887 InventorsAssigneeApplicationNo. 718335 filed on 08/27/1976US Classes:340/825.26, Stock quotation340/825.37Additional to other selective controlExaminersPrimary: Pitts, Harold I.Attorney, Agent or FirmInternational ClassH04Q 011/00Foreign Application Priority Data1975-08-30 UKAbstractA communication system for communicating between a central control unit and a plurality of controlled units, all interconnected by a single communication channel, wherein communication is time multiplexed with control words being transmitted in each direction during each time interval allocated to each separate controlled unit. The control words are transmitted during half-cycles of a periodic clock signal of one polarity, while data from the controlled units may be transmitted to the central control unit only during half-cycles of the periodic signal of the opposite polarity. | |
