| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 14 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Machines | |
| #3 | Surface technology and coating | |
| #4 | Transport | |
| #5 | Medical technology | |
| #6 | Mechanical elements |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ottmar Conradty | 14 |
| #2 | Hans Zollner | 3 |
| Publication | Filing date | Title |
|---|---|---|
| US2335388A | Switching device | |
| US2353444A | Connection of carbon bodies | |
| US2338409A | Connection for carbon segments of collectors | |
| US2306028A | Collector | |
| US2394041A | Insulated carbon body | |
| US2388123A | Carbon brake body and metal holder unit | |
| US2042653A | Collector for electric cars | |
| US1881262A | Arc lamp | |
| US1908321A | Arc lamp | |
| US1957940A | Body for use in electrolysis | |
| US1932954A | Condensing apparatus | |
| US1948166A | Holder for incandescent lamps | |
| US1538972A | Electric heater |