| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 40 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Basic materials chemistry | |
| #3 | Materials and metallurgy | |
| #4 | Machine tools | |
| #5 | Textiles and paper | |
| #6 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Steam turbines | |
| #2 | Cyclically operating valves | |
| #3 | Gas-turbine plants | |
| #4 | Internal-combustion piston engines | |
| #5 | Sawing | |
| #6 | Springs | |
| #7 | Casting metal | |
| #8 | Controlling combustion engines | |
| #9 | Printing machines | |
| #10 | Producer gas production |