Foster Airdata Systems, Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4873483 Multi input lightning detection systemExpiredNov 18, 88Oct 10, 89[G01W]
4803421 Multi input lightning detection systemExpiredJan 19, 88Feb 07, 89[G01R, G01W]
4413322 Automatic waypoint area navigation systemExpiredDec 17, 80Nov 01, 83[G06F]
D270901 Face plate and controls for an aeronautical radio navigation deviceExpiredDec 17, 80Oct 11, 83[D100]
4395906 Storm mapping systemExpiredJan 16, 81Aug 02, 83[G01W]
4383260 Low profile electric field sensorExpiredMar 27, 81May 10, 83[H01Q, G01W]
4366578 Transmit/receive mode protection arrangementExpiredFeb 19, 81Dec 28, 82[H04B]
4335468 Simultaneous transmission signal detection systemExpiredJan 09, 80Jun 15, 82[H04B]

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