| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Japan | 15 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | General building constructions | |
| #2 | Foundations and excavations | |
| #3 | Swimming pools |
| # | Name | Total Patents |
|---|---|---|
| #1 | Koyama Tomoyoshi | 10 |
| #2 | Takase Ryuji | 6 |
| #3 | Touhou Hiroo | 4 |
| #4 | Takase Riyuuji | 4 |
| #5 | Toho Hiroo | 1 |
| Publication | Filing date | Title |
|---|---|---|
| JPS6070229A | Construction of basement with sun room on its upper part | |
| JPS59217836A | Underground structure | |
| JPS59217837A | Covering for joint of underground structure | |
| JPS5733630A | Basement in combination with prefabricated foundation | |
| JPS5289226A | Method of building underground structure | |
| JPS5251733A | Underground structure | |
| JPS5248238A | Connection structure | |
| JPS5248212A | Method of building basement |