| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 5 | |
| #2 | EPO (European Patent Office) | 3 | |
| #3 | United Kingdom | 2 | |
| #4 | United States | 2 | |
| #5 | Switzerland | 1 | |
| #6 | France | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Optics | |
| #3 | Machine tools | |
| #4 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Pipes | |
| #2 | Venting or aerating devices | |
| #3 | Optical systems | |
| #4 | Unspecified technologies | |
| #5 | Metal-working |
| # | Name | Total Patents |
|---|---|---|
| #1 | Schulz Wilhelm | 11 |
| #2 | Kirchkamp Josef | 5 |
| #3 | Popp Hermann Dipl-Ing | 1 |
| #4 | Wellbrock Werner Dipl Chem Dr | 1 |
| #5 | Kost Wolfgang Dr Ing | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE3700125A1 | Flange | |
| DE3624117A1 | Flange for internally enamelled pipes, connection stubs or containers | |
| DE3208106C1 | Transition piece for heated pipes | |
| US4441365A | Sight-glass mounting | |
| DE3145086A1 | SIGHT GLASS FITTING | |
| EP0072372A1 | Flange | |
| EP0054574A1 | Flange | |
| DE2947169A1 | METHOD FOR PRODUCING A SHUT-OFF HOUSING FOR PIPELINES OR THE LIKE. |