| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 6 | |
| #2 | EPO (European Patent Office) | 3 | |
| #3 | Hong Kong | 3 | |
| #4 | Singapore | 3 | |
| #5 | China | 2 | |
| #6 | Republic of Korea | 2 | |
| #7 | Canada | 1 | |
| #8 | Taiwan | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Thermal processes | |
| #3 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Special electric heating or lighting | |
| #2 | Details of furnaces | |
| #3 | Pipes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Nagano Shigetoshi | 14 |
| #2 | Watanabe Toru | 6 |
| #3 | Sogabe Akira | 4 |
| #4 | Tanaka Tadayoshi | 3 |
| #5 | Sakaguchi Isao | 3 |
| #6 | Takanaka Akira | 3 |
| #7 | Tadayoshi Tanaka | 1 |
| #8 | Moriya Kazuo | 1 |
| #9 | Isao Sakaguchi | 1 |
| #10 | Takanaka Akiraa | 1 |
| Publication | Filing date | Title |
|---|---|---|
| HK1012832A1 | Sheathed heater | |
| SG52414A1 | Sheathed heater | |
| US5401937A | Sheathed heater | |
| US5064996A | Electric furnace |