| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 11 | |
| #2 | Canada | 3 | |
| #3 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines | |
| #3 | Thermal processes | |
| #4 | Control | |
| #5 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Steam traps | |
| #2 | Unspecified technologies | |
| #3 | Domestic heating systems | |
| #4 | Systems controlling non-electric variables | |
| #5 | Venting or aerating devices | |
| #6 | Pumps | |
| #7 | Pistons and sealings |
| # | Name | Total Patents |
|---|---|---|
| #1 | Dunham Clayton Aubra | 15 |
| Publication | Filing date | Title |
|---|---|---|
| US1128426A | Inlet-valve. | |
| US1128425A | Radiator-trap. | |
| CA140908A | Steam trap | |
| US1048508A | Air-valve. | |
| US1035557A | Steam-trap. | |
| US986967A | Steam-trap. | |
| CA123563A | Vacuum air valve | |
| US938226A | Vacuum air-valve. | |
| CA110546A | Automatic valve | |
| US907478A | Thermostatic controller. | |
| US884913A | Feed-water regulator. | |
| US842637A | Automatic valve. | |
| US865171A | Thermostatic controller. | |
| GB190317790A | Improvements in Steam Traps. | |
| US735733A | Draine-valve. |