| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 12 | |
| #2 | United States | 2 | |
| #3 | France | 1 | |
| #4 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Machines | |
| #3 | Consumer goods | |
| #4 | Audio-visual technology | |
| #5 | Medical technology | |
| #6 | Environmental technology | |
| #7 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Electric incandescent lamps | |
| #2 | Unspecified technologies | |
| #3 | Buttons, pins and buckles | |
| #4 | Advertising | |
| #5 | Climate change mitigation in buildings | |
| #6 | Fire-fighting | |
| #7 | Operating tables |
| # | Name | Total Patents |
|---|---|---|
| #1 | Otto Fehler | 2 |
| #2 | Fehler Otto | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US1572521A | Electric incandescent lamp for advertising purposes | |
| GB148918A | Improvements in electric advertising signs | |
| DE323202C | Device to prevent the radiation of heat from lighting |