PLATO, INC.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6195687 Method and apparatus for master-slave control in a educational classroom communication networkExpiredMar 18, 98Feb 27, 01[G06F]
6185688 Method for controlling security of a computer removably coupled in a networkExpiredMar 18, 98Feb 06, 01[G06F]
6008923 Multiple beam communication network with beam selectivityExpiredMar 16, 98Dec 28, 99[H04B]

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