| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 12 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Mechanical elements | |
| #3 | Engines, pumps and turbines | |
| #4 | Packaging and shipping | |
| #5 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Pumps | |
| #3 | Winches | |
| #4 | Earth drilling | |
| #5 | Venting or aerating devices | |
| #6 | Gearing | |
| #7 | Frames | |
| #8 | Clutches and brakes | |
| #9 | Unspecified technologies | |
| #10 | Controlling combustion engines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Anderson Carl M | 7 |
| #2 | Oswald Duda | 4 |
| #3 | Norris Joseph B | 1 |
| #4 | Johnston Horace G | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2329576A | Slush pump valve | |
| US2356371A | Draw works | |
| US2342507A | Variable speed reversing mechanism | |
| US2360753A | Universal speed control for multiple prime movers | |
| US2204877A | Adjustable engine skid | |
| US2287343A | Method of securing devices to shafts | |
| US2199582A | Reverse clutch | |
| US2149718A | Brake controlling lever mechanism | |
| US2210202A | Traveling block | |
| US2093352A | Power | |
| US2001818A | Valve mechanism | |
| US873669A | Hydraulic swivel. |