| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 6 | |
| #2 | Switzerland | 4 | |
| #3 | France | 4 | |
| #4 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Chemical engineering | |
| #2 | Mechanical elements | |
| #3 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Separation | |
| #2 | Pipes | |
| #3 | Machines for making railways |
| # | Name | Total Patents |
|---|---|---|
| #1 | Zapp Hermann | 3 |
| #2 | Eschemann Hans Dipl-Ing | 2 |
| #3 | Karl-Heinz Bostel | 2 |
| #4 | Wilcke Rudolf | 2 |
| #5 | Bostel Karl-Heinz | 2 |
| #6 | Bergmann Theodor | 1 |
| #7 | Hermann Zapp | 1 |
| #8 | Heinz Bostel Karl | 1 |
| #9 | Werner Wassmer | 1 |
| #10 | Hansen Frithjof | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE2649261A1 | Rubber mounting flange for hose - has armouring layer closely enclosing reinforcing component and joined to it | |
| DE2608703A1 | Rubber coupling flange for reinforced rubber hose - has hose reinforcement clamped in flange by compressed rings | |
| DE1536819A1 | Filter press equipment | |
| DE1536815A1 | Filter press plate for chamber or frame filter presses | |
| DE935973C | Rail joint insulation | |
| DE820739C | Electrical rail insulation for the railway superstructure |