| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 25 | |
| #2 | United Kingdom | 3 | |
| #3 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Control | |
| #2 | Electrical machinery and energy | |
| #3 | Civil engineering | |
| #4 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | Alarm systems | |
| #2 | Electric switches | |
| #3 | Doors and windows | |
| #4 | Lighting device details | |
| #5 | Electrically-conductive connections | |
| #6 | Special electric heating or lighting | |
| #7 | Sound-producing devices | |
| #8 | Safes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Egon Lewin | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2175354A | Electrostatic relay | |
| GB490879A | Improvements in or relating to electrostatic apparatus for relays and the like | |
| GB399337A | Improvements in and relating to shutters or screens for windows and other openings | |
| GB350519A | Improvements in or relating to electrical burglar alarm apparatus | |
| DE334613C | Translucent wood lampshade |