| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Japan | 5 | |
| #2 | Canada | 3 | |
| #3 | Germany | 2 | |
| #4 | France | 1 | |
| #5 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Engines, pumps and turbines | |
| #3 | Measurement |
| # | Name | Total Patents |
|---|---|---|
| #1 | Nakagawa Torakichi | 10 |
| #2 | Ootsuka Shigeo | 1 |
| #3 | Kuroki Masanao | 1 |
| Publication | Filing date | Title |
|---|---|---|
| JPH02278168A | Apparatus for inspecting electric winding | |
| JPS5469621A | Tester of ignition plug of engine | |
| JPS5392052A | Experimental device for ignition plug of engine | |
| JPS5392051A | Experimental device for ignition plug of engine | |
| JPS528235A | Tester of automotive contactless ignition system | |
| CA826785A | Electronic analyser for internal combustion engine | |
| CA798992A | Spark plug tester |