| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 3 | |
| #2 | Switzerland | 2 | |
| #3 | Netherlands | 2 | |
| #4 | Australia | 1 | |
| #5 | Canada | 1 | |
| #6 | Italy | 1 | |
| #7 | Sweden | 1 |
| # | Industry | |
|---|---|---|
| #1 | Agriculture | |
| #2 | Measurement | |
| #3 | Environmental technology |
| # | Technology | |
|---|---|---|
| #1 | Animal care | |
| #2 | Analysing materials | |
| #3 | Water treatment |
| # | Name | Total Patents |
|---|---|---|
| #1 | Kipper Horst | 6 |
| #2 | Horst Kaspar | 2 |
| #3 | Kipper H | 1 |
| #4 | Niermeier Werner | 1 |
| #5 | Horst Kipper | 1 |
| Publication | Filing date | Title |
|---|---|---|
| AU1740376A | Ph indicator for aquariums | |
| DE2635023A1 | PH colour indicator instrument for aquarium water - is small vessel containing pH sensitive colouring agent with reflective surface behind | |
| DE2629577A1 | Electric heater for aquarium - has water-tight flexible heater mat forming support dimensioned to suit base | |
| DE2523086A1 | Closed circuit supply of nutrient for plants in aquaria - including carbon dioxide replenishment and redox system |