| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 18 | |
| #2 | United Kingdom | 2 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Mechanical elements | |
| #4 | Measurement | |
| #5 | Engines, pumps and turbines | |
| #6 | Control |
| # | Name | Total Patents |
|---|---|---|
| #1 | Macclatchie John W | 13 |
| #2 | Johnson Glenn D | 3 |
| #3 | Green Howard D | 2 |
| #4 | Thies Carl A | 2 |
| #5 | Chrisman John L | 1 |
| #6 | Atkinson Stanley H | 1 |
| #7 | Perry Donald E | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2354967A | Line blind | |
| US2320975A | Piston | |
| US2320974A | Blowout preventer | |
| US2311381A | Device for damping pressure | |
| US2320973A | Pump piston | |
| US2277925A | Weight indicator | |
| US2284890A | Governor compensator | |
| US2235307A | Sealing means | |
| US2277002A | Well swab | |
| GB502203A | Expansible cutter tool | |
| GB497877A | Expansible cutter tool | |
| US2178876A | Valve | |
| US2159541A | Blowout preventer | |
| US2164857A | Rotatable packer | |
| US2116903A | Expansible cutter tool | |
| US2116898A | Expansible cutter tool | |
| US2182899A | Packer | |
| US2129433A | Blow-out preventer | |
| US2132037A | Blow-out preventer | |
| US2163885A | Liner construction |