| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 5 | |
| #2 | Austria | 4 | |
| #3 | Switzerland | 3 | |
| #4 | Denmark | 3 | |
| #5 | Spain | 2 | |
| #6 | United States | 2 | |
| #7 | Canada | 1 |
| # | Industry | |
|---|---|---|
| #1 | Audio-visual technology | |
| #2 | Electrical machinery and energy | |
| #3 | Textiles and paper |
| # | Technology | |
|---|---|---|
| #1 | Advertising | |
| #2 | Reproduction of printing surfaces | |
| #3 | Electric discharge tubes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Herrmann Carl Borro | 15 |
| #2 | Carl Borro Herrmann | 3 |
| Publication | Filing date | Title |
|---|---|---|
| GB191308198A | Improvements in or relating to Electric Glow-lamps. | |
| CA145155A | Advertising device | |
| US1091335A | Multiple letter for advertising-boards, skylights, and the like. | |
| GB191113116A | Advertising Apparatus. | |
| GB191113114A | Improved Advertising Apparatus. | |
| GB191113117A | Advertising Apparatus. | |
| GB190428180A | Method of Producing Stereotype-plates for Printing Purposes. | |
| US766037A | Method of producing stereotype-plates for printing purposes. |