Kabushiki Kaisha Iseki Kaihatsu Koki

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Patent Activity in the Last 10 Years

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5904238 Duel belt conveyor systemExpiredJul 25, 97May 18, 99[B65G]
5797202 Vertical hole excavating machineExpiredDec 05, 96Aug 25, 98[E02F]
5538362 Shield excavatorExpiredMar 22, 95Jul 23, 96[E21D]
5527135 Method for injecting lubricant or back-filling material into a space between the outside of double-wall pipes and the ground in the pipe-jacking method and an apparatus thereforExpiredFeb 15, 94Jun 18, 96[F16L]
5501548 Method for controlling the direction of a shield tunneling machine and an apparatus thereforExpiredFeb 24, 94Mar 26, 96[E21D]
5484232 Method for injecting lubricant and filler in the pipe-jacking methodExpiredFeb 15, 94Jan 16, 96[F16L]
5392897 ConveyorExpiredOct 26, 93Feb 28, 95[B65G]
5393172 Shield tunneling machineExpiredJun 02, 93Feb 28, 95[E21D]
5370479 Shielding apparatusExpiredJun 04, 93Dec 06, 94[E21B]
5339241 Method and system for controlling a travelling body so as to move forward along the predetermined route of the movement of travelling bodyExpiredJun 24, 91Aug 16, 94[G06F]
5297582 Method for water leakage prevention in pipelineExpiredMar 19, 93Mar 29, 94[F16L]
5296915 Method and apparatus for controlling direction of excavating machineExpiredJul 13, 92Mar 22, 94[E21D, G01B, E21B]
5224742 Method for cutting off water in pipeline and structure of connection portion in pipelineExpiredJul 29, 91Jul 06, 93[F16L]
5193938 Method and apparatus for laying pipeExpiredJun 28, 91Mar 16, 93[E02D]
5190407 Rectangular shield excavating machineExpiredJan 06, 92Mar 02, 93[E21D]
5157982 Rotary actuatorExpiredJun 12, 91Oct 27, 92[F01B, F16H]
5156490 Shield tunnelling apparatusExpiredMar 28, 91Oct 20, 92[E21D, G01B, E21B]
5123708 Shield tunnelling machineExpiredJul 26, 90Jun 23, 92[E21D]
5102201 Shield tunnelling machineExpiredDec 03, 90Apr 07, 92[E21D]
5096332 Method for water leakage prevention in pipeline and liner for water leakage preventionExpiredAug 13, 90Mar 17, 92[E03B]

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