Invention Grant
- Patent Title: Tool for making deep wells.
- Patent Title (中): 制造深井的工具。
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Application No.: US1904211793Application Date: 1904-06-09
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Publication No.: US769080APublication Date: 1904-08-30
- Inventor: HEETER CHARLES M
- Applicant: HEETER CHARLES M
- Assignee: Charles M Heeter
- Current Assignee: Charles M Heeter
- Priority: US1904211793 1904-06-09
Information query
