| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 7 | |
| #2 | United States | 2 | |
| #3 | Germany | 1 | |
| #4 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Environmental technology | |
| #3 | Electrical machinery and energy | |
| #4 | Machines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Saint Jacques Paul Antoine Min | 1 |
| #2 | Robert Hicguet | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB225164A | Improvements in the control of change speed gear for use with electric motors | |
| US1587645A | Control of electric motors | |
| US1595293A | Traction installation with direct-current motor | |
| DE434684C | Control relay with several windings through which the armature current and inductor current flow for electric rail motors with shunt or special excitation |