| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 5 | |
| #2 | Denmark | 3 | |
| #3 | Austria | 2 | |
| #4 | Finland | 2 | |
| #5 | France | 2 | |
| #6 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Environmental technology | |
| #3 | Biotechnology | |
| #4 | Organic fine chemistry |
| # | Technology | |
|---|---|---|
| #1 | Batteries | |
| #2 | Reduction of greenhouse gas emissions | |
| #3 | Fermentation | |
| #4 | Lighting device details | |
| #5 | Portable lighting devices | |
| #6 | Heterocyclic compounds |
| # | Name | Total Patents |
|---|---|---|
| #1 | Erich Marhenkel | 2 |
| #2 | Emil Zender | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB495381A | Improvements in and relating to electric battery lamps | |
| GB472094A | An improved galvanic cell | |
| US2164755A | Galvanic battery | |
| GB456426A | Positive electrode for galvanic cells | |
| GB445379A | An improved galvanic cell | |
| GB401953A | Improvements in electric torches |