| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 4 | |
| #2 | Germany | 3 | |
| #3 | France | 3 | |
| #4 | United Kingdom | 2 | |
| #5 | Spain | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Environmental technology |
| # | Technology | |
|---|---|---|
| #1 | Portable lighting devices | |
| #2 | Electrically-conductive connections | |
| #3 | Batteries | |
| #4 | Reduction of greenhouse gas emissions |
| # | Name | Total Patents |
|---|---|---|
| #1 | Cosmophos-Werke A-G | 4 |
| Publication | Filing date | Title |
|---|---|---|
| GB172482A | Improvements in and relating to electric pocket-lamps | |
| DE366831C | Electric flashlight | |
| GB142031A | Improvements in and relating to electric pocket lamps | |
| DE327742C | Electric torch with split housing | |
| DE324386C | Incandescent lamp screw socket with split thread basket, especially for electric torches |