| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Australia | 3 | |
| #2 | Brazil | 1 | |
| #3 | Canada | 1 | |
| #4 | China | 1 | |
| #5 | EPO (European Patent Office) | 1 | |
| #6 | Hong Kong | 1 | |
| #7 | Israel | 1 | |
| #8 | Republic of Korea | 1 | |
| #9 | Mexico | 1 | |
| #10 | Russian Federation | 1 | |
| #11 | United States | 1 | |
| #12 | WIPO (World Intellectual Property Organization) | 1 | |
| #13 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy |
| # | Technology | |
|---|---|---|
| #1 | Spark gaps and corona devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Martin Perry D | 13 |
| #2 | Witherspoon Christopher J | 13 |
| #3 | Christopher J Witherspoon | 1 |
| #4 | Perry D Martin | 1 |
| Publication | Filing date | Title |
|---|---|---|
| USRE47073E | Spark plug | |
| AU2013201142A1 | Spark plug | |
| CN103155313A | Spark plug |