Two way communication system
January 26, 2008. 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 3444521 3602891 3757225 Premium interactive communication system System arrangement for distribution and use of video games System for controlling power distribution to customer loads Wireless audio passenger entertainment system (WAPES) Community antenna television arrangement for the reception and distribution of TV - and digital audio signals Video game table for airlines commercial vehicles or the like Two-way CATV system with AML commands InventorAssigneeApplicationNo. 148591 filed on 01/26/1988US Classes:725/75, Vehicle340/3.41, Collision avoidance340/3.51, Polling or roll call340/825.24, Of audio system370/449, Polling725/77, Seat-back terminal725/82Local server or headendExaminersPrimary: Safourek, Benedict V.Assistant: Bocure, Tesfaldet Attorney, Agent or FirmForeign Patent References
International ClassH04H 001/06Foreign Application Priority Data1987-02-17 JPAbstractAn information transmitting system capable of two way communication, suitable for use in transmitting information signals between a central control unit and a plurality of terminal apparatus units. Each terminal apparatus unit may be located at a different passenger seat in an aircraft, a train, a bus, or the like. The signals transmitted from each terminal apparatus to the central control unit are transmitted by way of two channels. In one operating mode, one channel is used as a random access channel, and the other is used as a polling channel. When polling transmission is not effected, the polling channel is used as a second random access channel, so that the system may efficiently transmit many information signals on two random access channels.Other References
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