Cairo Systems, Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6044698 Method and apparatus including accelerometer and tilt sensor for detecting railway anomaliesExpiredNov 30, 98Apr 04, 00[E01C]
5987979 Method and apparatus for detecting railtrack failures by comparing data from a plurality of railcarsExpiredNov 30, 98Nov 23, 99[B61K]
5956664 Method and apparatus for monitoring railway defectsExpiredMar 31, 97Sep 21, 99[B61L, G01C]
5867404 Method and apparatus for monitoring railway defectsExpiredMar 31, 97Feb 02, 99[H04B, G01S]

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