| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Australia | 2 | |
| #2 | Argentina | 1 | |
| #3 | Brazil | 1 | |
| #4 | Canada | 1 | |
| #5 | China | 1 | |
| #6 | Cuba | 1 | |
| #7 | Czechia | 1 | |
| #8 | Germany | 1 | |
| #9 | Algeria | 1 | |
| #10 | Ecuador | 1 | |
| #11 | EPO (European Patent Office) | 1 | |
| #12 | Hungary | 1 | |
| #13 | India | 1 | |
| #14 | Iceland | 1 | |
| #15 | Republic of Korea | 1 | |
| #16 | Malaysia | 1 | |
| #17 | Norway | 1 | |
| #18 | New Zealand | 1 | |
| #19 | Panama | 1 | |
| #20 | Poland | 1 | |
| #21 | Taiwan | 1 | |
| #22 | United States | 1 | |
| #23 | WIPO (World Intellectual Property Organization) | 1 | |
| #24 | Yugoslavia (Serbia and Montenegro) | 1 | |
| #25 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Environmental technology | |
| #3 | Machines | |
| #4 | Packaging and shipping | |
| #5 | Consumer goods | |
| #6 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Machines for liquids | |
| #2 | Reduction of greenhouse gas emissions | |
| #3 | Spring or inertia motors | |
| #4 | Unspecified technologies | |
| #5 | Elevators and escalators | |
| #6 | Ladders | |
| #7 | Live-saving devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Liou David | 24 |
| Publication | Filing date | Title |
|---|---|---|
| CN106103979A | Water wheel arrangement and controlling organization thereof | |
| TW201506247A | Waterwheel and the controlling mechanism therefor | |
| MY143876A | Controllable transmission system and method thereof | |
| YU15898A | Gravity generating system | |
| PL320248A1 | Gravity-based energy generating system | |
| NZ314872A | Hydroelectric generator comprises vertically moving tanks | |
| AU689409B1 | Generating system | |
| CA2205709A1 | Gravity generating system | |
| ZA9704380B | Gravity generating system. | |
| DE19541631A1 | Circulating ladder | |
| KR0143337B1 | Circulatable ladder |