| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 28 | |
| #2 | Canada | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Mechanical elements | |
| #3 | Thermal processes | |
| #4 | Engines, pumps and turbines | |
| #5 | Control |
| # | Name | Total Patents |
|---|---|---|
| #1 | Roberts Earl W | 11 |
| #2 | Plaut Antoine P | 6 |
| #3 | Roberts William H | 3 |
| #4 | Roberts Thomas H | 3 |
| #5 | Kincaid William S | 1 |
| #6 | Herbert Roberts Thomas | 1 |
| #7 | Johnson Roy W | 1 |
| #8 | Ferrall Thomas L | 1 |
| #9 | Roberts Thomas Herbert | 1 |
| #10 | Prosper Plaut Antoine | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2457779A | Gas cock | |
| US2118232A | Gas cock | |
| US2119385A | Control means for lighter mechanism | |
| US2018034A | Pilot regulating cock | |
| US1949182A | Pilot jet assembly | |
| US2035762A | Gas cock | |
| US1921779A | Gas cock | |
| US1953776A | Gas cock | |
| US1921778A | Gas lighter construction | |
| US1881638A | Thermostat assembly | |
| US1818275A | Adjustable support for gas lighters and the like | |
| US1838870A | Valve assembly | |
| US1832426A | Valve assembly | |
| US1762195A | Gas cock | |
| US1744143A | Lock for valves | |
| US1577206A | Automatic thread-cutting-machine attachment | |
| US1647582A | Sprinkler | |
| US1762193A | Fluid-control device | |
| US1482484A | Bib cock | |
| US1712166A | Governor |