US PATENT SUBCLASS 104 / 97
.~ Beef-jack type


Current as of: June, 1999
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104 /   HD   RAILWAYS

96  DF  TROLLEY TRANSFER {9}
97.~ Beef-jack type


DEFINITION

Classification: 104/97

(under subclass 96) A shifting device for bodily lifting a trolley from one track and placing it on another track.