| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 10 | |
| #2 | Switzerland | 3 | |
| #3 | France | 3 |
| # | Industry | |
|---|---|---|
| #1 | Basic communication technologies | |
| #2 | Measurement | |
| #3 | Electrical machinery and energy |
| # | Name | Total Patents |
|---|---|---|
| #1 | Robert Buck | 3 |
| #2 | Buck Robert | 3 |
| #3 | Linden Walter | 1 |
| #4 | Marhofer Gerd | 1 |
| #5 | Maag Heinz | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE2626955A1 | Hand held probe for checking proximity switch oscillating circuits - has coil in tip exposed when sliding screen is retracted | |
| DE2140385A1 | ELECTRONIC, CONTACTLESS SWITCHING DEVICE | |
| DE2130022B1 | Switching device, especially electronic, non-contact switching device | |
| DE1966213A1 | Electronic contactless working distance indicator |