| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 3 | |
| #2 | Sweden | 3 | |
| #3 | Canada | 2 | |
| #4 | United States | 2 | |
| #5 | Israel | 1 | |
| #6 | Italy | 1 | |
| #7 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Agriculture | |
| #3 | Electrical machinery and energy |
| # | Technology | |
|---|---|---|
| #1 | Pumps | |
| #2 | Animal care | |
| #3 | Dynamo-electric machines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Kolfertz E | 8 |
| Publication | Filing date | Title |
|---|---|---|
| GB1389869A | Diaphragm pumps with pressure pulsation damping chambers | |
| GB1309301A | External filters for aquaria | |
| ZA7005988B | Pumping apparatus |