Viewfacts, Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5226177 Real-time wireless audience response systemExpiredAug 03, 92Jul 06, 93[H04B]
4955070 Apparatus and method for automatically monitoring broadcast band listening habitsExpiredJun 29, 88Sep 04, 90[H04B, H04R]
4829558 System and device for data transmission, and related methodExpiredJan 19, 88May 09, 89[H04M]

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