| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 4 | |
| #2 | Canada | 3 | |
| #3 | United Kingdom | 2 | |
| #4 | Austria | 1 | |
| #5 | Switzerland | 1 | |
| #6 | Spain | 1 | |
| #7 | France | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Spark gaps and corona devices | |
| #2 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hurley Roy T | 7 |
| #2 | Hurley-Townsend Corporation | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB421048A | Cooled and shielded spark plugs | |
| GB421245A | Cooled and shielded sparking plugs | |
| ES129845A1 | Shielded spark plug with air cooling. | |
| US1996422A | Cooled and shielded spark plug | |
| US1815714A | Method of making spark plugs | |
| US1812438A | Spark plug | |
| US1996421A | Spark plug | |
| CA348927A | Spark plug | |
| CA322085A | Spark plug | |
| CA322086A | Spark plug |