| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 3 | |
| #2 | United States | 3 | |
| #3 | Austria | 2 | |
| #4 | Switzerland | 2 | |
| #5 | United Kingdom | 2 | |
| #6 | France | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Measurement | |
| #3 | Engines, pumps and turbines | |
| #4 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Gearing | |
| #2 | Clutches and brakes | |
| #3 | Mechanically-driven clocks | |
| #4 | Springs | |
| #5 | Unspecified technologies | |
| #6 | Controlling combustion engines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Duffing Georg | 13 |
| Publication | Filing date | Title |
|---|---|---|
| US1070589A | Reduction-gearing. | |
| US1178996A | Hydraulic locking device for braking, adjusting, and other purposes. | |
| GB191006039A | Improvements in or relating to Hydraulic Locking Gears for Braking, Adjusting and other purposes. | |
| GB190907921A | Improvements in Toothed Wheels. | |
| US799459A | Speed-regulator for explosion-engines. |