| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 24 |
| # | Industry | |
|---|---|---|
| #1 | Measurement | |
| #2 | Materials and metallurgy | |
| #3 | Audio-visual technology | |
| #4 | Optics | |
| #5 | Machine tools | |
| #6 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Mechanically-driven clocks | |
| #2 | Electromechanical clocks | |
| #3 | Machines for making clocks | |
| #4 | Casting metal | |
| #5 | Radio-controlled time-pieces | |
| #6 | Advertising | |
| #7 | Accessories for machine tools | |
| #8 | Ammunition fuzes | |
| #9 | Time-interval measuring | |
| #10 | Cameras |