| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 43 | |
| #2 | Canada | 2 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Furniture and games | |
| #3 | Chemical engineering | |
| #4 | Mechanical elements | |
| #5 | Engines, pumps and turbines | |
| #6 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Domestic washing | |
| #2 | Unspecified technologies | |
| #3 | Unspecified technologies | |
| #4 | Separation | |
| #5 | Non-positive-displacement pumps | |
| #6 | Venting or aerating devices | |
| #7 | Measuring volume | |
| #8 | Shafts | |
| #9 | Separating solids | |
| #10 | Pipes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Spencer Ira H | 43 |
| #2 | Spencer Ira Hobart | 2 |
| Publication | Filing date | Title |
|---|---|---|
| US1296872A | Reservoir and controlling-valve for organs. | |
| US1199216A | Vacuum-gage. | |
| US1061205A | Apparatus for propelling fluids. | |
| US1118594A | Valve. | |
| US1103549A | Dust-separator. | |
| US1198396A | Testing apparatus. | |
| US1161263A | Cleaning apparatus. | |
| US1162195A | Cleaning-tool. | |
| US1155525A | Regulator to control the flow of fluid. | |
| US1146602A | Apparatus for creating flow of dirt-laden fluid. | |
| US1016972A | Separator. | |
| US1066541A | Shaft-bearing. | |
| US1053665A | Pneumatic cleaning-tool. | |
| US1162412A | Cleaning-tool. | |
| US1031391A | Valve. | |
| US980355A | Hose connection. | |
| US981893A | Cleaning-tool and connection. | |
| US1063078A | Cleaning-tool. | |
| US1072783A | Cleaning apparatus. | |
| US982640A | Cleaning-tool. |