Tokyo Keiki Co., Ltd.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6393151 Pattern reading systemExpiredMay 30, 95May 21, 02[G06K]
5334984 Method and system for locating direction of transmission source based on wave therefromExpiredJul 28, 92Aug 02, 94[G01S]
5231997 Heating apparatus and method for hyperthermiaExpiredFeb 28, 91Aug 03, 93[A61N]
5148814 Heating apparatus for hyperthermiaExpiredJan 04, 91Sep 22, 92[A61N]
5128972 Memory package systemExpiredFeb 22, 90Jul 07, 92[H04L]
5109693 Thermally stabilized accelerometerExpiredMay 18, 90May 05, 92[G01P]
5101856 Electromagnetic directional control valveExpiredJun 28, 90Apr 07, 92[F16K, F15B]
5065162 Communication system for helicopterExpiredJun 06, 90Nov 12, 91[G01S]
5053582 Electromagnetic waves shield tapeExpiredMay 25, 90Oct 01, 91[H01B]
5033478 Heating apparatus for hyperthermiaExpiredApr 10, 89Jul 23, 91[A61N]
5025810 Heating apparatus for hyperthermiaExpiredApr 14, 89Jun 25, 91[A61N]
5026959 Microwave radiator for warming therapyExpiredOct 18, 89Jun 25, 91[H05B]
5027130 Tapered energy absorbing radome portionExpiredApr 25, 90Jun 25, 91[H01Q]
5017045 Method and apparatus for controlling attitude of shield excavatorExpiredJul 26, 90May 21, 91[E02D]
5009103 Ultrasonic thickness measuring method and apparatusExpiredJan 31, 89Apr 23, 91[G01N]
5008486 Electromagnetic wave shielding panels and wall structureExpiredDec 21, 89Apr 16, 91[H05K]
4965503 Positional information generating apparatus and code means thereforExpiredMar 23, 89Oct 23, 90[G05B]
4937795 Access alarming method and apparatus for working vehicleExpiredJul 05, 88Jun 26, 90[G01S]
4930358 Method of and apparatus for measuring flow velocity by using ultrasonic wavesExpiredMar 21, 88Jun 05, 90[G01F]
4922752 Flatness integrating/recording apparatusExpiredSep 02, 88May 08, 90[G01B]

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