| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 252 |
| # | Industry | |
|---|---|---|
| #1 | Optics | |
| #2 | Measurement | |
| #3 | Weapons | |
| #4 | Electrical machinery and energy | |
| #5 | Telecommunications |
| # | Technology | |
|---|---|---|
| #1 | Optical systems | |
| #2 | Measuring distances | |
| #3 | Cameras | |
| #4 | Spectacles | |
| #5 | Weapon sights | |
| #6 | Photomechanical semiconductor production | |
| #7 | Transmission | |
| #8 | Measuring length, angles and areas | |
| #9 | Lighting device details | |
| #10 | Analysing materials |