| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 4 | |
| #2 | United States | 4 | |
| #3 | Australia | 1 | |
| #4 | China | 1 | |
| #5 | EPO (European Patent Office) | 1 | |
| #6 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Electrical machinery and energy |
| # | Technology | |
|---|---|---|
| #1 | Ladders | |
| #2 | Finishing work on buildings | |
| #3 | Swimming pools | |
| #4 | General building constructions | |
| #5 | Platform constructions | |
| #6 | Special light sources | |
| #7 | Lighting device details |
| # | Name | Total Patents |
|---|---|---|
| #1 | Kuo Chingyao | 11 |
| #2 | Liefke Norman William | 7 |
| #3 | Norman William Liefke | 5 |
| Publication | Filing date | Title |
|---|---|---|
| CA2961055A1 | Handrail and railing assembly | |
| US2018258648A1 | Handrail and railing assembly | |
| US9732528B1 | Accessible passageway assembly | |
| CA2935765A1 | Assembly outdoor balcony | |
| CA2935756A1 | Supporting mechanism for glass fence | |
| US2018002949A1 | Supporting mechanism for glass fence | |
| US9822521B1 | Assembly outdoor balcony | |
| AU2008362048A1 | An extension ladder |