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Patents for Oil Well Supply Co. | |||||
Number | Date | Patentee | Title | Type | |
171,999 | Jan. 11, 1876 | W. Crumbie | Improvement in Pipe-Wrench or Tongs | pipe tongs | |
250,029 | Nov. 22, 1881 | D. Worden | Pipe Tongs | pipe tongs | |
345,777 | Jul. 20, 1886 | G.E. Franklin | Pipe Wrench | pipe wrenches | |
1,259,852 | Mar. 19, 1918 | E.E. Greve | Rotary Drilling Apparatus | ||
1,259,855 | Mar. 19, 1918 | E.E. Greve | Rotary Drilling Apparatus |