| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 14 | |
| #2 | United Kingdom | 3 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Machine tools | |
| #3 | Optics | |
| #4 | Environmental technology | |
| #5 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Supplying combustion engines | |
| #2 | Non-positive-displacement pumps | |
| #3 | Handles for hand implements | |
| #4 | Cameras | |
| #5 | Climate change mitigation in transportation | |
| #6 | Shafts |
| # | Name | Total Patents |
|---|---|---|
| #1 | Naumann Arthur | 3 |
| Publication | Filing date | Title |
|---|---|---|
| GB361103A | Photo printing device | |
| GB290731A | Controlling gear for centrifugal compressors | |
| GB265638A | Improvements in centrifugal compressors | |
| DE371780C | Carburettor with joint regulation of the fuel delivery and air inlet cross-sections |