E.T.M. REALTY TRUST

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4939703 Transducer baffle and sensor using sameExpiredJul 17, 89Jul 03, 90[G01S]
4829442 Beacon navigation system and method for guiding a vehicleExpiredMay 16, 86May 09, 89[G06F, B62D]
4821192 Node map system and method for vehicleExpiredNov 28, 86Apr 11, 89[G06F, B62D]
4815840 Position locating system for a vehicleExpiredMay 16, 86Mar 28, 89[B60T, G01C, B25J]
4815008 Orientation adjustment system and robot using sameExpiredMay 16, 86Mar 21, 89[G06F, B62D]
4777416 Recharge docking system for mobile robotExpiredMay 16, 86Oct 11, 88[H02J, G05D]
4772875 Intrusion detection systemExpiredMay 16, 86Sep 20, 88[G08B]
4751658 Obstacle avoidance systemExpiredMay 16, 86Jun 14, 88[B25J]
4736116 Power-up sequencing apparatusExpiredMay 16, 86Apr 05, 88[B25J]
4710020 Beacon proximity detection system for a vehicleExpiredMay 16, 86Dec 01, 87[G01C, B25J]
4701893 Ultrasonic ranging systemExpiredMay 16, 86Oct 20, 87[H04B, G01V]

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