| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Mechanical elements | |
| #3 | Civil engineering | |
| #4 | Agriculture |
| # | Technology | |
|---|---|---|
| #1 | Spraying devices | |
| #2 | Venting or aerating devices | |
| #3 | Horticulture | |
| #4 | Installations for obtaining water |
| # | Name | Total Patents |
|---|---|---|
| #1 | Michaelis Johann | 7 |
| Publication | Filing date | Title |
|---|---|---|
| DE734747C | Device for achieving intermittent irrigation | |
| DE730372C | Sprinkler for intermittent water delivery | |
| DE735923C | Sprinkler | |
| DE739347C | Switching device for the rotating movement of sprinklers | |
| DE733188C | Swivel sprinkler | |
| DE735181C | Sprinkler with automatic, intermittent water discharge | |
| DE732907C | Wide beam sprinkler |