| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 5 | |
| #2 | Germany | 4 | |
| #3 | France | 3 | |
| #4 | United Kingdom | 2 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Pumps | |
| #2 | Machines | |
| #3 | Cyclically operating valves | |
| #4 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Scheffer Harry | 6 |
| #2 | Scheffer H | 3 |
| Publication | Filing date | Title |
|---|---|---|
| GB1352068A | Compressed gas operated thrust piston motors | |
| DE2113612A1 | A thrust piston engine operated with a gas flow medium | |
| DE2020317A1 | Pumping device | |
| US3556690A | Motor-driven pump for delivering liquids at a pressure substantially constant and independent from the delivery | |
| DE1653497A1 | Motor-driven pump for pumping fluids at essentially constant pressure, regardless of the amount withdrawn | |
| DE1601454A1 | Control slide, e.g. for a thrust piston engine operated with a gaseous pressure medium |