Invention Grant
- Patent Title: Electromagnetic apparatus for pipe-line surveys
- Patent Title (中): 管线调查用电磁设备
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Application No.: US42833742Application Date: 1942-01-26
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Publication No.: US2382743APublication Date: 1945-08-14
- Inventor: PENTHER CARL J , ROLFSON FRANCIS B
- Applicant: SHELL DEV
- Assignee: Shell Development Co
- Current Assignee: Shell Development Co
- Priority: US42833742 1942-01-26
- Main IPC: G01V3/08
- IPC: G01V3/08
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