Cellular Technical Services Company, Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6035188 Active waveform collection for use in transmitter identificationExpiredJun 27, 96Mar 07, 00[H04Q]
6021315 System and method for testing of wireless communication devicesExpiredNov 19, 97Feb 01, 00[H04Q, G01R]
5999806 Waveform collection for use in wireless telephone identificationExpiredFeb 28, 97Dec 07, 99[H04Q]
5999807 System and method for the verification of authentic telephone numbers in a wireless telephone systemExpiredFeb 28, 97Dec 07, 99[H04M]
5970405 Apparatus and method for preventing fraudulent calls in a wireless telephone system using destination and fingerprint analysisExpiredFeb 28, 97Oct 19, 99[H04Q]
5956634 System and method for detection of fraud in a wireless telephone systemExpiredFeb 28, 97Sep 21, 99[H04B]
5956635 Detection and prevention of channel grabbing in a wireless communications systemExpiredJul 16, 96Sep 21, 99[H04B]
5940751 System and method for detection of fraud in a wireless telephone systemExpiredJun 27, 96Aug 17, 99[H04Q]
5924025 System and method for detection of redial fraud in a cellular telephone systemExpiredOct 25, 96Jul 13, 99[H04M]
5893031 System and method for collection of transmission characteristicsExpiredJun 27, 96Apr 06, 99[H04Q]
5819171 Automated forced call disruption for use with wireless telephone systemsExpiredAug 31, 95Oct 06, 98[H04M]
5715518 Adaptive waveform matching for use in transmitter identificationExpiredMar 06, 96Feb 03, 98[H04B]
5673306 Cellular rental phone system and method having realtime data collection and billingExpiredNov 20, 92Sep 30, 97[H04Q]
5517555 Real time information system for cellular telephonesExpiredSep 21, 94May 14, 96[H04M, H04Q]
5301223 Cellular telephone system with remote programming, voice responsive registration and real time billingExpiredAug 25, 92Apr 05, 94[H04M, H04Q]

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