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| All Patents in class 285/333 | |||||
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| Number | Date | Patentee | Title | Type | |
| 597,000 | Jan. 11, 1898 | C.A. Higbee | Pipe coupling | ||
| 946,919 | Jan. 18, 1910 | A.A. Koch | Corrugated culvert and process of producing same | ||
| 1,253,149 | Jan. 08, 1918 | W. Childers | Drilling Tool Joint | ||
| 1,287,203 | Dec. 10, 1918 | A.M. Saunders, P. Boyd | Drill Tube Section | well digging or drilling tools | |