| # | Industry | |
|---|---|---|
| #1 | Agriculture | |
| #2 | Chemical engineering | |
| #3 | Environmental technology | |
| #4 | Mechanical elements | |
| #5 | Control |
| # | Technology | |
|---|---|---|
| #1 | Horticulture | |
| #2 | Mixing | |
| #3 | Climate change adaptation technologies | |
| #4 | Systems controlling non-electric variables | |
| #5 | Venting or aerating devices | |
| #6 | Planting | |
| #7 | Servomotors | |
| #8 | Pipes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hansen Volmer Christian | 14 |
| #2 | Christian Hansen Volmer | 2 |
| #3 | Hansen V C | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE2553878A1 | SELF-REGULATING PLANT IRRIGATION DEVICE | |
| DE1928789A1 | System for sprinkling water or fertilizers in greenhouses | |
| GB1079474A | Improvements in or relating to adjustable hydraulic resistance | |
| ES291938A1 | Improvements in or relating to the continuous mixing of liquids | |
| GB947288A | Improvements in or relating to water supply hoses | |
| GB952817A | Automatic watering valve | |
| GB920302A | Improvements in or relating to the control of liquid dispensing systems |