Patent search ap:("LO RAIN AQUA DUCT SYSTEM LTD") AND inv:"OWENS ROBERT A" Page 1

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发明授权
Tool for laying underground tubing and cable 失效
Title translation: 铺设地下管道和电缆的工具

公开(公告)号：US3323313A

公开(公告)日：1967-06-06

申请号：US35205364

申请日：1964-03-16

Applicant: LO RAIN AQUA DUCT SYSTEM LTD

Inventor： OWENS ROBERT A

IPC: E02B11/02 , E02F5/10 , F16L1/032 , H02G1/06

CPC classification number: F16L1/032 , E02F5/102 , H02G1/06

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