| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 6 | |
| #2 | Germany | 3 | |
| #3 | Canada | 2 | |
| #4 | Japan | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools | |
| #2 | Chemical engineering | |
| #3 | Electrical machinery and energy |
| # | Technology | |
|---|---|---|
| #1 | Blasting | |
| #2 | Separation | |
| #3 | Spark gaps and corona devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Fricke Roy A | 11 |
| #2 | Roi Ei Furitsuke | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE3009480A1 | Two=way spark plug cleaner - utilises multidirectional impeller allowing escape of particulate in 360 degree pattern to avoid bounce-back | |
| US4236902A | Modular air purifying device | |
| US4202141A | Two way spark plug cleaner and method | |
| US4165586A | Spark plug cleaner and method | |
| US4121916A | Portable air purge | |
| US4028851A | Sparkplug cleaner | |
| CA1012358A | Spark plug cleaner | |
| US3868790A | Spark plug cleaner |