| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 7 | |
| #2 | United Kingdom | 5 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy |
| # | Technology | |
|---|---|---|
| #1 | AC and DC conversion devices | |
| #2 | Electric switches | |
| #3 | Emergency protective circuit arrangements |
| Publication | Filing date | Title |
|---|---|---|
| GB751276A | Improvements in mechanical rectifiers having roller contacts | |
| GB740957A | Improvements in mechanical or commutator rectifiers | |
| GB729192A | Improvements in roller contact arrangements for mechanically driven rectifiers or other rotating-contact electric apparatus | |
| GB735261A | Improvements relating to mechanical rectifiers |