| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 13 | |
| #2 | United Kingdom | 3 | |
| #3 | United States | 3 | |
| #4 | Switzerland | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy |
| # | Technology | |
|---|---|---|
| #1 | Electrically-conductive connections | |
| #2 | Electric switches | |
| #3 | Dynamo-electric machines | |
| #4 | Installation of electric cables |
| # | Name | Total Patents |
|---|---|---|
| #1 | Bruno Raettig | 4 |
| Publication | Filing date | Title |
|---|---|---|
| US1477527A | Contact spring | |
| GB211366A | Improvements in electric contacts | |
| GB213051A | Improvements in and connected with plug and socket contacts | |
| US1467011A | Plug switch | |
| US1418171A | Plug and socket contact | |
| GB186465A | Improvements in self-aligning contacts for electrical apparatus |