| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 4 | |
| #2 | Denmark | 3 | |
| #3 | Norway | 3 | |
| #4 | Australia | 2 | |
| #5 | China | 2 | |
| #6 | Czechia | 2 | |
| #7 | German Democratic Republic | 2 | |
| #8 | EPO (European Patent Office) | 2 | |
| #9 | Finland | 2 | |
| #10 | Israel | 2 | |
| #11 | Japan | 2 | |
| #12 | Mexico | 2 | |
| #13 | New Zealand | 2 | |
| #14 | Singapore | 2 | |
| #15 | Brazil | 1 | |
| #16 | Canada | 1 | |
| #17 | India | 1 | |
| #18 | Republic of Korea | 1 | |
| #19 | Poland | 1 | |
| #20 | Russian Federation | 1 | |
| #21 | USSR (Union of Socialist Soviet Republics) | 1 | |
| #22 | Yugoslavia (Serbia and Montenegro) | 1 | |
| #23 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Packaging and shipping | |
| #3 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Indexing scheme relating to hinges | |
| #2 | Wing fittings | |
| #3 | Elevators and escalators | |
| #4 | Unspecified technologies | |
| #5 | Hinges for doors or windows |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ribaudo Nickolas | 19 |
| #2 | Ribaudo Nickolas A | 17 |
| #3 | Nikorasu Riboodo | 1 |
| #4 | Nickolas Ribaudo | 1 |
| #5 | Ribauko Nickolas | 1 |
| #6 | Ribaudo N | 1 |
| Publication | Filing date | Title |
|---|---|---|
| SG115793G | Hydraulic door opening or closing device | |
| SG111493G | Sliding door assembly | |
| US5219275A | Hydraulic door actuator | |
| US5161957A | Hydraulic door actuator | |
| US5107677A | Hydraulic door actuator | |
| AU2434388A | Sliding door assembly | |
| IL85638A | Hydraulic door opening or closing device | |
| US4910961A | Hydraulic door opening or closing device |