| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 21 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Engines, pumps and turbines | |
| #3 | Civil engineering | |
| #4 | Mechanical elements | |
| #5 | Packaging and shipping | |
| #6 | Medical technology |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Earth drilling | |
| #3 | Pumps | |
| #4 | Winches | |
| #5 | Gearing | |
| #6 | Syringes | |
| #7 | Servomotors | |
| #8 | Shafts | |
| #9 | Machines | |
| #10 | Clutches and brakes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Trout Walter C | 21 |
| Publication | Filing date | Title |
|---|---|---|
| US2019549A | Pumping unit with sliding gear crank arm release | |
| US1895181A | Pumping unit | |
| US1840066A | Walking beam | |
| US1819799A | Beam hanger | |
| US1860121A | Weighted rod line swivel | |
| US1834438A | Walking beam head yoke | |
| US1900675A | Pumping power | |
| US1914387A | Counterbalance for crank shafts | |
| US2071008A | Combined balance and counterbalance for crankshafts | |
| US2071007A | Counterbalance for crankshafts | |
| US1771103A | Pitman | |
| US1644862A | Make-up post | |
| US1656456A | Gripping device for rotaries | |
| US1504167A | Safety expansion brake drum | |
| US1544703A | Clutch mechanism for rotaries | |
| US1523733A | Traveling block | |
| US1507035A | Crown block | |
| US1424327A | Expansion sprocket | |
| US1052985A | Dipping-tank for lumber. | |
| US731633A | Steam-feed valve. |