| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 9 | |
| #2 | France | 1 | |
| #3 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Measurement | |
| #2 | Electrical machinery and energy | |
| #3 | Telecommunications | |
| #4 | Control | |
| #5 | Audio-visual technology | |
| #6 | Basic communication technologies |
| # | Technology | |
|---|---|---|
| #1 | Measuring electric variables | |
| #2 | Selecting | |
| #3 | Coin-freed | |
| #4 | Electric switches | |
| #5 | Special information storage | |
| #6 | Pulse technique |
| # | Name | Total Patents |
|---|---|---|
| #1 | Gerspach Wolfram | 7 |
| #2 | Gerspach Dr Wolfram | 2 |
| #3 | Gerspach Dr Phil Wolfram | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB1127810A | Step by step electromagnetic switch |