| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Republic of Korea | 17 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Environmental technology | |
| #3 | Packaging and shipping |
| # | Technology | |
|---|---|---|
| #1 | Sewers | |
| #2 | Foundations and excavations | |
| #3 | Climate change adaptation technologies | |
| #4 | Construction of roads | |
| #5 | Platform constructions | |
| #6 | Containers for goods storage |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ji Un Young | 17 |
| #2 | Kim Hyang Suk | 4 |
| #3 | Lee Sang Gak | 1 |
| #4 | Kim Mi Hee | 1 |
| Publication | Filing date | Title |
|---|---|---|
| KR20090033555A | Drain cover coupling | |
| KR20090033554A | Drainage way cover | |
| KR20090028918A | Grating | |
| KR20090010562A | Grating | |
| KR20090002752A | Drain cover coupling | |
| KR20080112532A | Drainage way cover | |
| KR100754962B1 | Manhole where opening and closing are convenient | |
| KR100798742B1 | Drain cover coupling | |
| KR100830721B1 | A manhole supporting frame | |
| KR100821198B1 | Manhole | |
| KR100798743B1 | Conduit of type open | |
| KR100757358B1 | Tranch cover | |
| KR100743019B1 | Manhole support | |
| KR20070105665A | Tranch cover | |
| KR100720163B1 | Cover for a u-drain | |
| KR20070045620A | Manhole | |
| KR20040067389A | Manhole Cover |