| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 6 | |
| #2 | Germany | 2 | |
| #3 | Italy | 2 | |
| #4 | Spain | 1 | |
| #5 | United Kingdom | 1 | |
| #6 | Israel | 1 | |
| #7 | Japan | 1 | |
| #8 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Engines, pumps and turbines | |
| #3 | Machines | |
| #4 | Control | |
| #5 | Civil engineering | |
| #6 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Clutches and brakes | |
| #2 | Spring or inertia motors | |
| #3 | Unspecified technologies | |
| #4 | Gearing | |
| #5 | Systems controlling non-electric variables | |
| #6 | Non-positive-displacement pumps | |
| #7 | Pumps | |
| #8 | Sewers | |
| #9 | Venting or aerating devices | |
| #10 | Measuring volume |
| # | Name | Total Patents |
|---|---|---|
| #1 | Duveau Francois | 5 |
| #2 | Duveau Francois Charles Louis | 1 |
| #3 | Furansowa Deyuboo | 1 |
| Publication | Filing date | Title |
|---|---|---|
| IL59759D0 | Apparatus for the accumulation and periodic release of mechanical energy | |
| FR2439313A1 | deep well pump actuated from surface - has variable cylinder volume in the well connected to hydraulic accumulator and hand pump on surface | |
| DE1266006B | Float switch |