Maruma Jysuharyo Kabushiki Kaisha

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5116391 Curved surface rubbing apparatusExpiredMay 14, 91May 26, 92[B24B]
5005654 High torque hydraulic shoe bolt wrenchExpiredDec 18, 89Apr 09, 91[B25B]
4881365 Assembly apparatus for truck linksExpiredJan 06, 89Nov 21, 89[B21L]
4869417 Automatic build-up welding machine for track rollersExpiredOct 26, 88Sep 26, 89[B23K]
4805826 Slag removing apparatus for pad-welding machineExpiredSep 21, 87Feb 21, 89[B23K]
4718228 Apparatus for displacing a line of track chainExpiredSep 04, 84Jan 12, 88[B21L]
4621491 Method of discriminating fitting pressure for links on a track pressExpiredJun 24, 85Nov 11, 86[B21L]
4622451 Apparatus for rebuilding worn shoe grouser for track chainExpiredFeb 07, 85Nov 11, 86[B23K]
4543818 Seal check apparatus for lubricant-enclosure type track joints of track chainsExpiredFeb 18, 83Oct 01, 85[G01M]
4531355 Jig for assembling a track chainExpiredAug 01, 83Jul 30, 85[B21L]
4233487 Metal build-up apparatus with improved cooling meansExpiredOct 05, 78Nov 11, 80[B23K]

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