| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Mechanical elements | |
| #3 | Packaging and shipping |
| # | Technology | |
|---|---|---|
| #1 | Non-positive-displacement pumps | |
| #2 | Siphons | |
| #3 | Pistons and sealings | |
| #4 | Containers for goods storage |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hillgren E | 6 |
| #2 | Hillgren E M | 2 |
| #3 | Alfredsson Kjell | 2 |
| #4 | Alfredsson K E H | 2 |
| #5 | Blinge H | 2 |
| #6 | Olsson Aron | 2 |
| #7 | Nisslert K-G | 1 |
| #8 | Malte Hillgren Eric | 1 |
| #9 | Hillgren Eric M | 1 |
| #10 | Lindahl B | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE2602136A1 | PUMP WHEEL | |
| FI750326A | Anordning vid en horizontal dadbelsidigt sugande centrifugalpump | |
| GB1468029A | Centrifugal pumps | |
| DE2345742A1 | DEVICE FOR A DOUBLE-SIDED CENTRIFUGAL PUMP | |
| GB1312585A | Shaft sealing device | |
| DE2113800A1 | Device for maintaining a certain pressure in the pressure chamber of a pump seal, which is filled with blocking agent | |
| DE1922249A1 | Device for evacuating the suction line in a pump or the like. |