| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 12 | |
| #2 | Austria | 4 | |
| #3 | Switzerland | 4 | |
| #4 | United States | 2 | |
| #5 | Netherlands | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Civil engineering | |
| #3 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Venting or aerating devices | |
| #2 | Sewers | |
| #3 | Unspecified technologies | |
| #4 | Hydraulic engineering |
| # | Name | Total Patents |
|---|---|---|
| #1 | Karl Reppert | 6 |
| #2 | Reppert Karl | 5 |
| #3 | Matthias Karl | 2 |
| #4 | Waldenmaier Heinz Dipl-Kfm | 2 |
| #5 | Kemmler Alfred | 1 |
| #6 | Matthias H Karl | 1 |
| #7 | Neumeister Willy Dr | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2888036A | Butterfly valve with sealing ring movable mounted for accommodation to seat | |
| US2791396A | Butterfly valves | |
| DE1013134B | Check valve | |
| DE1018277B | Butterfly valve | |
| DE967332C | Butterfly valve | |
| DE954658C | Regulating valve | |
| DE915764C | Shut-off valve with ball valve | |
| DE960402C | Butterfly valve | |
| DE877077C | Gate valve for gaseous media | |
| DE864494C | Gate valve | |
| DE842568C | Valve | |
| DE830724C | Process for the production of sealing rings for shut-off devices | |
| DE758693C | Shut-off device made of enamelled material with enamelled inner surfaces and a special seat for aggressive media |