| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 44 | |
| #2 | Canada | 6 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Electrical machinery and energy | |
| #3 | Machines | |
| #4 | Mechanical elements | |
| #5 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Burners | |
| #2 | Lighting device details | |
| #3 | Domestic stoves | |
| #4 | Ignition and extinguishing | |
| #5 | Unspecified technologies | |
| #6 | Portable lighting devices | |
| #7 | Controlling combustion | |
| #8 | Venting or aerating devices | |
| #9 | Unspecified technologies | |
| #10 | Vehicle parts |
| # | Name | Total Patents |
|---|---|---|
| #1 | Humphrey Alfred H | 50 |
| #2 | Humphrey George A | 1 |
| #3 | Humphrey Fred J | 1 |
| #4 | Humphrey Herbert S | 1 |
| #5 | Humphrey Hubert R | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US1781642A | License-plate holder | |
| US1621412A | Sign | |
| US1388433A | Gas-burner | |
| US1535472A | Radiating element for gas heaters | |
| US1396210A | Gas-burner | |
| US1464609A | Gas heater | |
| US1373430A | Method of finishing metal surfaces | |
| US1358155A | Gas-stove | |
| US1245347A | Gas-burner. | |
| US1245346A | Gas-burner. | |
| US1280740A | Gas-stove. | |
| US1125907A | Combination gas and electric lamp. | |
| US1097719A | Gas-lamp. | |
| US1095209A | Valve-operating device. | |
| US1095208A | Gas-lamp. | |
| US1026039A | Gas-cock-operating device. | |
| US950597A | Gas-lamp. | |
| US1015562A | Mantle-support for gas-lamps. | |
| US940530A | Lamp-globe. | |
| US985261A | Gas-lamp. |