| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 3 | |
| #2 | Austria | 2 | |
| #3 | Switzerland | 2 | |
| #4 | France | 2 | |
| #5 | United Kingdom | 2 | |
| #6 | United States | 2 |
| # | Industry | |
|---|---|---|
| #1 | Surface technology and coating | |
| #2 | Computer technology |
| # | Technology | |
|---|---|---|
| #1 | Coating metallic material | |
| #2 | Analogue computers |
| # | Name | Total Patents |
|---|---|---|
| #1 | Reisszeugfabrik A-G J B Soelln | 1 |
| #2 | Konrad Becker | 1 |
| #3 | J B Soellner Nachf Reisszeugfa | 1 |
| #4 | Willy Pieper | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB218619A | Process for the production of a weather-proof oxide layer on electron metal | |
| US1554176A | Slide rule | |
| GB214604A | Improvements in slide rules |