| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 8 | |
| #2 | Switzerland | 3 | |
| #3 | United States | 2 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Controlling combustion | |
| #2 | Analysing materials | |
| #3 | Steam generation |
| # | Name | Total Patents |
|---|---|---|
| #1 | Germer Wilhelm E | 10 |
| #2 | Wilhelm E Germer | 3 |
| Publication | Filing date | Title |
|---|---|---|
| US2252369A | Efficiency indicating apparatus | |
| US2252367A | Efficiency meter |