| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 26 | |
| #2 | Germany | 2 | |
| #3 | United Kingdom | 2 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Mechanical elements | |
| #4 | Packaging and shipping |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Unspecified technologies | |
| #3 | Pipes | |
| #4 | Pistons and sealings | |
| #5 | Unspecified technologies | |
| #6 | Winches |
| # | Name | Total Patents |
|---|---|---|
| #1 | Waldo Sheldon | 26 |
| Publication | Filing date | Title |
|---|---|---|
| US2226947A | Well drilling apparatus | |
| US2180724A | Rotary drilling | |
| US2026709A | Power system for well drilling | |
| US1904256A | Drilling machinery | |
| US1832841A | Well drilling apparatus | |
| US1776797A | Packing for rotary well drilling | |
| US1781707A | Well-drilling apparatus | |
| US1670596A | Well-drilling engine | |
| US1774531A | Well-drilling apparatus | |
| US1781706A | Well-drilling apparatus | |
| US1772370A | Hoisting apparatus | |
| US1634917A | Well-drilling apparatus | |
| US1612226A | Well-drilling apparatus | |
| US1681502A | Well-drilling apparatus | |
| GB240439A | Improvements in well drilling | |
| US1772369A | Well-bailing pump | |
| US1562373A | Drill-pipe coupling | |
| US1562372A | Flush-joint pipe | |
| US1772368A | Well-drill rotary table | |
| US1681501A | Well drilling |