HARNISCHFEGER CORPORATION

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5398396 Method and apparatus for withdrawing a machine shaftExpiredFeb 26, 93Mar 21, 95[B23P, B62D, E02F]
5339919 Boarding ladder assembly having a variable counterweight lifting forceExpiredFeb 05, 93Aug 23, 94[E06C]
5289928 Mining shovel with improved center gudgeon bottom retainerExpiredOct 27, 92Mar 01, 94[B65G]
5289092 Apparatus and method for d.c. motor controlExpiredAug 05, 91Feb 22, 94[H02P]
5022542 Crane leg connectionExpiredDec 09, 88Jun 11, 91[B66C]
4949516 Crane truss connecting jointExpiredDec 09, 88Aug 21, 90[E04H]
4949854 Anti-sway crane reeving apparatusExpiredDec 09, 88Aug 21, 90[B66C]
4949855 Anti-sway crane reeving apparatusExpiredDec 09, 88Aug 21, 90[B66C]
4854547 Vehicle-mounted retrieval winch and control means thereforExpiredAug 24, 87Aug 08, 89[B66D]
4375936 Stacker crane for movement of coilsExpiredAug 18, 80Mar 08, 83[B66C]

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