| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 10 | |
| #2 | United States | 3 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Electric switches | |
| #2 | Electrically-conductive connections | |
| #3 | Mechanical control devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Johann Valerius | 3 |
| Publication | Filing date | Title |
|---|---|---|
| US1770894A | Series switch | |
| US1629896A | Push-button switch | |
| US1595061A | Electric cut-out |