Patent search ap:("STAMICARBON") AND inv:"VROONHOVEN JAN L J VAN" Page 1

1.

发明授权
Driving and control gear for coal ploughs and other mining machines 失效
Title translation: 煤犁等采矿机械的驱动和控制装置

公开(公告)号：US3293521A

公开(公告)日：1966-12-20

申请号：US34638564

申请日：1964-02-18

Applicant: STAMICARBON

Inventor： VROONHOVEN JAN L J VAN

IPC: E21C29/00 , E21C29/14

CPC classification number: E21C29/00 , E21C29/14

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