Koehring GmbH

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4534419 Method for pile driving and draggingExpiredJul 20, 78Aug 13, 85[E02D]
4465145 Cushioned drive cap for a pile driverExpiredJan 04, 82Aug 14, 84[B25D, E21B]
4382715 Mass compensated impacting apparatusExpiredJul 17, 80May 10, 83[E01C]
4348901 Apparatus for monitoring the degree of compactionExpiredOct 17, 80Sep 14, 82[G01N, E01C]
4305252 Centering and cooling equipment for a hydraulic vibration generatorExpiredJul 12, 79Dec 15, 81[F15B]
4265130 Vibration generator with adjustable eccentric weightExpiredSep 12, 79May 05, 81[B06B]
4240326 Hydraulic vibration exciter and method of cooling thereofExpiredJun 21, 79Dec 23, 80[F15B]

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