| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 9 | |
| #2 | Switzerland | 1 | |
| #3 | France | 1 | |
| #4 | United Kingdom | 1 | |
| #5 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Audio-visual technology | |
| #2 | Machine tools | |
| #3 | Electrical machinery and energy | |
| #4 | Optics | |
| #5 | Basic materials chemistry | |
| #6 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Advertising | |
| #2 | Grinding tools | |
| #3 | Cameras | |
| #4 | Hand-held cutting tools | |
| #5 | Lighting device details | |
| #6 | Purifying gas composition | |
| #7 | Incandescent mantles | |
| #8 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Adolf Weigel | 2 |
| #2 | Weigel Adolf | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB241690A | Improved projection apparatus for projecting advertisements | |
| US1514275A | Apparatus for projecting advertisements upon and through a screen |