| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 15 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Thermal processes | |
| #4 | Control | |
| #5 | Chemical engineering |
| # | Name | Total Patents |
|---|---|---|
| #1 | Work Ernest W | 6 |
| #2 | Cadwell William H | 6 |
| #3 | John Ott | 5 |
| #4 | Patrick Burns Edward | 2 |
| #5 | Crocker Charles D | 1 |
| #6 | Kavle Oscar C | 1 |
| #7 | Kelso Howard F | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2241337A | Liquid agitating and siphon break apparatus | |
| US2253410A | Vacuum breaker | |
| US2189694A | Vacuum breaker | |
| US2125662A | Radiator air valve | |
| US2047722A | Pressure, temperature, and vacuum relief valve | |
| US2071152A | Springless pressure relief valve | |
| US1998155A | Flush valve | |
| US1991100A | Flush valve | |
| US1910237A | Vacuum radiator valve | |
| US1803958A | Seat operated flush valve | |
| US1657817A | Fixed-time flush valve | |
| US1672366A | Flush valve | |
| US1653492A | Flush valve | |
| US1521355A | Flush valve | |
| US1521354A | Flush valve |